{
  "title": "Making Frequency Tables - Grade 4 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "If you counted 5 red balls, 3 blue balls, and 2 green balls, what would be the frequency of blue balls?", "options": {"A": "5", "B": "2", "C": "3", "D": "8"}, "correct_answer": "C"},
    {"id": 2, "difficulty": "easy", "question": "Sarah has 4 apples, 3 oranges, and 5 bananas. What is the frequency of oranges?", "options": {"A": "4", "B": "5", "C": "3", "D": "12"}, "correct_answer": "C"},
    {"id": 3, "difficulty": "easy", "question": "In a frequency table, what does the 'frequency' column show?", "options": {"A": "The colors of items", "B": "How many times something occurs", "C": "The price of items", "D": "The size of items"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "If 8 students like pizza, 5 like burgers, and 7 like sandwiches, what is the total frequency?", "options": {"A": "15", "B": "20", "C": "18", "D": "19"}, "correct_answer": "B"},
    {"id": 5, "difficulty": "easy", "question": "Which of these would be the best title for a frequency table about favorite ice cream flavors?", "options": {"A": "My Summer Vacation", "B": "Favorite Ice Cream Flavors", "C": "Types of Animals", "D": "Math Problems"}, "correct_answer": "B"},
    {"id": 6, "difficulty": "easy", "question": "Tom counted 6 dogs, 4 cats, and 3 birds in his neighborhood. What is the frequency of cats?", "options": {"A": "6", "B": "4", "C": "3", "D": "13"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "In a frequency table, what goes in the first column?", "options": {"A": "The counts", "B": "The categories or items", "C": "The dates", "D": "The prices"}, "correct_answer": "B"},
    {"id": 8, "difficulty": "easy", "question": "If a frequency table shows: Red-7, Blue-5, Green-8, how many blue items are there?", "options": {"A": "7", "B": "8", "C": "5", "D": "20"}, "correct_answer": "C"},
    {"id": 9, "difficulty": "easy", "question": "What is the purpose of making a frequency table?", "options": {"A": "To organize and count data", "B": "To draw pictures", "C": "To solve multiplication", "D": "To tell time"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "Maria has 3 pencils, 2 erasers, and 4 sharpeners. What is the frequency of pencils?", "options": {"A": "2", "B": "4", "C": "3", "D": "9"}, "correct_answer": "C"},
    {"id": 11, "difficulty": "easy", "question": "Which item would NOT belong in a frequency table about vehicles?", "options": {"A": "Car", "B": "Bus", "C": "Bicycle", "D": "Pizza"}, "correct_answer": "D"},
    {"id": 12, "difficulty": "easy", "question": "If you see 9 red cars, 6 blue cars, and 5 white cars, what is the total number of cars counted?", "options": {"A": "15", "B": "18", "C": "20", "D": "19"}, "correct_answer": "C"},
    {"id": 13, "difficulty": "easy", "question": "What do we call the table that shows how many times each item appears?", "options": {"A": "Multiplication table", "B": "Frequency table", "C": "Time table", "D": "Addition table"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "John counted 7 squares, 5 circles, and 8 triangles. What is the frequency of circles?", "options": {"A": "7", "B": "8", "C": "5", "D": "20"}, "correct_answer": "C"},
    {"id": 15, "difficulty": "easy", "question": "In a frequency table about fruit, which would be a category?", "options": {"A": "Apple", "B": "5", "C": "Red", "D": "Sweet"}, "correct_answer": "A"},
    {"id": 16, "difficulty": "easy", "question": "If the frequency of 'book' is 6 and 'pen' is 4, how many items are there total?", "options": {"A": "8", "B": "10", "C": "12", "D": "14"}, "correct_answer": "B"},
    {"id": 17, "difficulty": "easy", "question": "What information do you need to create a frequency table?", "options": {"A": "Data about different categories", "B": "Only colors", "C": "Only numbers", "D": "Only names"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Lisa found 4 ladybugs, 3 butterflies, and 6 bees. What is the frequency of bees?", "options": {"A": "4", "B": "3", "C": "6", "D": "13"}, "correct_answer": "C"},
    {"id": 19, "difficulty": "easy", "question": "Which of these is a frequency table most useful for?", "options": {"A": "Organizing counts of different items", "B": "Solving word problems", "C": "Learning the alphabet", "D": "Measuring length"}, "correct_answer": "A"},
    {"id": 20, "difficulty": "easy", "question": "If a frequency table has: Dogs-5, Cats-3, Fish-7, how many pets are there in total?", "options": {"A": "12", "B": "13", "C": "14", "D": "15"}, "correct_answer": "D"},

    {"id": 21, "difficulty": "medium", "question": "Create a frequency table for this data: Red, Blue, Red, Green, Blue, Red, Yellow, Blue, Red, Green. What is the frequency of Red?", "options": {"A": "3", "B": "4", "C": "2", "D": "5"}, "correct_answer": "B"},
    {"id": 22, "difficulty": "medium", "question": "In a survey of favorite subjects: Math-8, Science-6, English-7, Art-4. What is the difference between the most and least popular subjects?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 23, "difficulty": "medium", "question": "The frequency table shows: Apples-12, Oranges-8, Bananas-15. What percentage of the fruit are oranges? (Round to nearest whole number)", "options": {"A": "20%", "B": "23%", "C": "25%", "D": "28%"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "If the frequency of cars is 15, bikes is 20, and buses is 5, what is the ratio of bikes to buses?", "options": {"A": "2:1", "B": "3:1", "C": "4:1", "D": "5:1"}, "correct_answer": "C"},
    {"id": 25, "difficulty": "medium", "question": "From this data: A, B, A, C, B, A, A, C, B, A, create a frequency table. Which letter has frequency 2?", "options": {"A": "A", "B": "B", "C": "C", "D": "D"}, "correct_answer": "C"},
    {"id": 26, "difficulty": "medium", "question": "In a class survey, 12 students prefer soccer, 8 prefer basketball, and 5 prefer swimming. If 3 more students choose basketball, what will be the new frequency of basketball?", "options": {"A": "10", "B": "11", "C": "12", "D": "13"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "The frequency table shows: Winter-25, Summer-40, Spring-30, Fall-35. Which season has the median frequency?", "options": {"A": "Winter", "B": "Summer", "C": "Spring", "D": "Fall"}, "correct_answer": "D"},
    {"id": 28, "difficulty": "medium", "question": "If Book A appears 7 times, Book B appears 9 times, and Book C appears 4 times, what is the average frequency?", "options": {"A": "6", "B": "6.5", "C": "7", "D": "7.5"}, "correct_answer": "B"},
    {"id": 29, "difficulty": "medium", "question": "Create a frequency table for: Circle, Square, Triangle, Circle, Square, Circle, Triangle, Square, Circle. What is the total of all frequencies?", "options": {"A": "7", "B": "8", "C": "9", "D": "10"}, "correct_answer": "C"},
    {"id": 30, "difficulty": "medium", "question": "In a fruit basket frequency table: Apples:30%, Oranges:25%, Bananas:45%. If there are 60 fruits total, how many are bananas?", "options": {"A": "25", "B": "27", "C": "30", "D": "32"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "The frequencies of four colors are: 15, 12, 18, and 10. What is the range of these frequencies?", "options": {"A": "6", "B": "7", "C": "8", "D": "9"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "If Dog frequency is 3/5 of Cat frequency, and Cat frequency is 20, what is Dog frequency?", "options": {"A": "10", "B": "12", "C": "14", "D": "16"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "From data: X, Y, Z, X, Y, X, Z, X, Y, X - create frequency table. What is the mode?", "options": {"A": "X", "B": "Y", "C": "Z", "D": "X and Y"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "In a survey, Pizza got 15 votes, Burger got 12, Pasta got 8. What fraction of total votes did Burger get?", "options": {"A": "12/35", "B": "3/7", "C": "12/25", "D": "4/9"}, "correct_answer": "A"},
    {"id": 35, "difficulty": "medium", "question": "The frequency table shows: Grade 4-45, Grade 5-50, Grade 6-55. What is the total number of students?", "options": {"A": "140", "B": "145", "C": "150", "D": "155"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "If Red:Blue:Green = 3:2:4 and total items are 45, what is the frequency of Green?", "options": {"A": "15", "B": "18", "C": "20", "D": "22"}, "correct_answer": "C"},
    {"id": 37, "difficulty": "medium", "question": "Create frequency table for: 1, 2, 3, 1, 2, 1, 3, 2, 1, 1. What is the frequency of 2?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "In a book frequency table, Mystery books are 40% and there are 24 mystery books. How many books total?", "options": {"A": "50", "B": "55", "C": "60", "D": "65"}, "correct_answer": "C"},
    {"id": 39, "difficulty": "medium", "question": "The frequencies are: 8, 12, 6, 14. What is the mean frequency?", "options": {"A": "9", "B": "10", "C": "11", "D": "12"}, "correct_answer": "B"},
    {"id": 40, "difficulty": "medium", "question": "If Car frequency is 18 and Bike frequency is 12, what is Car frequency as a percentage of Bike frequency?", "options": {"A": "120%", "B": "140%", "C": "150%", "D": "160%"}, "correct_answer": "C"},
    {"id": 41, "difficulty": "medium", "question": "From data: A, B, C, A, B, A, C, A, B, A - create frequency table. Which has second highest frequency?", "options": {"A": "A", "B": "B", "C": "C", "D": "All equal"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "In a color survey, Red:Blue = 2:3 and Blue:Green = 4:5. If Green frequency is 30, what is Red frequency?", "options": {"A": "12", "B": "14", "C": "16", "D": "18"}, "correct_answer": "C"},
    {"id": 43, "difficulty": "medium", "question": "The frequency table shows: Math-18, Science-15, English-12. What is the average frequency?", "options": {"A": "14", "B": "15", "C": "16", "D": "17"}, "correct_answer": "B"},
    {"id": 44, "difficulty": "medium", "question": "If total frequency is 80 and A:B:C = 3:4:5, what is frequency of B?", "options": {"A": "20", "B": "24", "C": "28", "D": "32"}, "correct_answer": "B"},
    {"id": 45, "difficulty": "medium", "question": "Create frequency table for: Dog, Cat, Dog, Bird, Cat, Dog, Bird, Dog, Cat, Dog. What percentage are Cats?", "options": {"A": "25%", "B": "30%", "C": "35%", "D": "40%"}, "correct_answer": "B"},
    {"id": 46, "difficulty": "medium", "question": "In a survey, if 40% prefer Summer and Summer frequency is 32, how many people were surveyed?", "options": {"A": "70", "B": "75", "C": "80", "D": "85"}, "correct_answer": "C"},
    {"id": 47, "difficulty": "medium", "question": "The frequencies are: 25, 30, 35, 40. What is the median?", "options": {"A": "30", "B": "32.5", "C": "35", "D": "37.5"}, "correct_answer": "B"},
    {"id": 48, "difficulty": "medium", "question": "If Book frequency is 24 and this is 3/4 of Pen frequency, what is Pen frequency?", "options": {"A": "28", "B": "30", "C": "32", "D": "34"}, "correct_answer": "C"},
    {"id": 49, "difficulty": "medium", "question": "From data: 5, 3, 5, 2, 3, 5, 2, 5, 3, 5 - create frequency table. What is the mode?", "options": {"A": "2", "B": "3", "C": "5", "D": "No mode"}, "correct_answer": "C"},
    {"id": 50, "difficulty": "medium", "question": "In a fruit frequency table, if Apple:Orange = 5:3 and total is 64, how many oranges?", "options": {"A": "20", "B": "22", "C": "24", "D": "26"}, "correct_answer": "C"},
    {"id": 51, "difficulty": "medium", "question": "The frequency table shows: Grade A-20, Grade B-25, Grade C-15. What percentage got Grade B?", "options": {"A": "40%", "B": "41.7%", "C": "43.5%", "D": "45%"}, "correct_answer": "B"},
    {"id": 52, "difficulty": "medium", "question": "If Red frequency is 18 and this is 60% of total, what is the total frequency?", "options": {"A": "28", "B": "30", "C": "32", "D": "35"}, "correct_answer": "B"},
    {"id": 53, "difficulty": "medium", "question": "Create frequency table for: Mon, Tue, Mon, Wed, Tue, Mon, Thu, Mon, Tue. What is frequency of Monday?", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 54, "difficulty": "medium", "question": "In a survey, if Soccer:Football = 4:5 and Football:Cricket = 3:2, and Cricket frequency is 20, what is Soccer frequency?", "options": {"A": "22", "B": "24", "C": "26", "D": "28"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "medium", "question": "The frequencies are: 45, 35, 40, 50. What is the range?", "options": {"A": "10", "B": "12", "C": "15", "D": "18"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "medium", "question": "If Car frequency is 45 and Bike frequency is 30, what is the ratio of Bike to Car?", "options": {"A": "2:3", "B": "3:4", "C": "4:5", "D": "5:6"}, "correct_answer": "A"},
    {"id": 57, "difficulty": "medium", "question": "From data: X, Y, Z, X, Y, X, Z, X, Y, X - what is the difference between highest and lowest frequency?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 58, "difficulty": "medium", "question": "In a color frequency table, if Red is 40% and Blue is 30% and there are 24 blue items, how many red items?", "options": {"A": "28", "B": "30", "C": "32", "D": "34"}, "correct_answer": "C"},
    {"id": 59, "difficulty": "medium", "question": "The frequency table shows: Winter-60, Summer-80, Spring-70. What is the average?", "options": {"A": "65", "B": "68", "C": "70", "D": "72"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "medium", "question": "If total frequency is 120 and A:B = 2:3, B:C = 4:5, what is frequency of C?", "options": {"A": "40", "B": "45", "C": "50", "D": "55"}, "correct_answer": "B"},
    {"id": 61, "difficulty": "medium", "question": "Create frequency table for: 1, 2, 1, 3, 2, 1, 4, 2, 1, 3. What is the frequency of 1?", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 62, "difficulty": "medium", "question": "In a survey, if 25% prefer Math and Math frequency is 15, how many people prefer other subjects?", "options": {"A": "40", "B": "45", "C": "50", "D": "55"}, "correct_answer": "B"},
    {"id": 63, "difficulty": "medium", "question": "The frequencies are: 28, 32, 36, 24. What is the mean?", "options": {"A": "29", "B": "30", "C": "31", "D": "32"}, "correct_answer": "B"},
    {"id": 64, "difficulty": "medium", "question": "If Dog frequency is 42 and Cat frequency is 28, what is Dog frequency as percentage of Cat frequency?", "options": {"A": "140%", "B": "145%", "C": "150%", "D": "155%"}, "correct_answer": "C"},
    {"id": 65, "difficulty": "medium", "question": "From data: A, B, C, A, B, A, C, A, B, A - what is the total frequency?", "options": {"A": "8", "B": "9", "C": "10", "D": "11"}, "correct_answer": "C"},
    {"id": 66, "difficulty": "medium", "question": "In a fruit basket, Apple:Banana = 3:2 and Banana:Orange = 4:3. If oranges are 18, how many apples?", "options": {"A": "32", "B": "36", "C": "40", "D": "44"}, "correct_answer": "B"},
    {"id": 67, "difficulty": "medium", "question": "The frequency table shows: Grade 1-50, Grade 2-60, Grade 3-70. What is the total?", "options": {"A": "170", "B": "175", "C": "180", "D": "185"}, "correct_answer": "C"},
    {"id": 68, "difficulty": "medium", "question": "If Red:Blue = 5:4 and total is 54, what is Blue frequency?", "options": {"A": "20", "B": "22", "C": "24", "D": "26"}, "correct_answer": "C"},
    {"id": 69, "difficulty": "medium", "question": "Create frequency table for: Circle, Square, Triangle, Circle, Square, Circle, Triangle, Square, Circle. What is frequency of Square?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 70, "difficulty": "medium", "question": "In a survey, if Summer is 35% and Summer frequency is 42, how many people were surveyed?", "options": {"A": "115", "B": "118", "C": "120", "D": "122"}, "correct_answer": "C"},
    {"id": 71, "difficulty": "medium", "question": "The frequencies are: 55, 45, 65, 35. What is the median?", "options": {"A": "45", "B": "50", "C": "55", "D": "60"}, "correct_answer": "B"},
    {"id": 72, "difficulty": "medium", "question": "If Book frequency is 36 and this is 3/5 of Copy frequency, what is Copy frequency?", "options": {"A": "55", "B": "58", "C": "60", "D": "62"}, "correct_answer": "C"},
    {"id": 73, "difficulty": "medium", "question": "From data: X, Y, Z, X, Y, X, Z, X, Y, X - what is the mode?", "options": {"A": "X", "B": "Y", "C": "Z", "D": "X and Y"}, "correct_answer": "A"},
    {"id": 74, "difficulty": "medium", "question": "In a color frequency table, if Green is 25% and there are 20 green items, how many items total?", "options": {"A": "75", "B": "78", "C": "80", "D": "82"}, "correct_answer": "C"},
    {"id": 75, "difficulty": "medium", "question": "The frequency table shows: Math-24, Science-18, English-22. What is the average?", "options": {"A": "20.5", "B": "21", "C": "21.5", "D": "22"}, "correct_answer": "C"},
    {"id": 76, "difficulty": "medium", "question": "If total frequency is 90 and A:B:C = 2:3:4, what is frequency of A?", "options": {"A": "18", "B": "20", "C": "22", "D": "24"}, "correct_answer": "B"},
    {"id": 77, "difficulty": "medium", "question": "Create frequency table for: Dog, Cat, Dog, Bird, Cat, Dog, Bird, Dog, Cat, Dog. What percentage are Dogs?", "options": {"A": "40%", "B": "45%", "C": "50%", "D": "55%"}, "correct_answer": "C"},
    {"id": 78, "difficulty": "medium", "question": "In a survey, if 30% prefer Winter and Winter frequency is 27, how many people prefer other seasons?", "options": {"A": "58", "B": "60", "C": "62", "D": "63"}, "correct_answer": "D"},
    {"id": 79, "difficulty": "medium", "question": "The frequencies are: 48, 52, 56, 44. What is the mean?", "options": {"A": "49", "B": "50", "C": "51", "D": "52"}, "correct_answer": "B"},
    {"id": 80, "difficulty": "medium", "question": "If Car frequency is 54 and Bike frequency is 36, what is the ratio of Car to Bike?", "options": {"A": "2:3", "B": "3:2", "C": "4:3", "D": "5:3"}, "correct_answer": "B"},

    {"id": 81, "difficulty": "hard", "question": "A frequency table shows three categories with frequencies in ratio 3:4:5. If the total frequency is 144, what is the frequency of the middle category?", "options": {"A": "44", "B": "46", "C": "48", "D": "50"}, "correct_answer": "C"},
    {"id": 82, "difficulty": "hard", "question": "In a survey of 200 people, the frequency table shows: Pizza-25%, Burger-30%, Pasta-20%, Salad-25%. How many more people prefer Burger than Pasta?", "options": {"A": "18", "B": "20", "C": "22", "D": "24"}, "correct_answer": "B"},
    {"id": 83, "difficulty": "hard", "question": "The frequencies of four items are consecutive even numbers that total 84. What is the frequency of the smallest number?", "options": {"A": "16", "B": "18", "C": "20", "D": "22"}, "correct_answer": "B"},
    {"id": 84, "difficulty": "hard", "question": "In a frequency table, if category A is 40% of total, category B is 30%, and category C is 120 items, what is the total frequency?", "options": {"A": "380", "B": "390", "C": "400", "D": "410"}, "correct_answer": "C"},
    {"id": 85, "difficulty": "hard", "question": "The ratio of frequencies A:B is 2:3 and B:C is 4:5. If total frequency is 185, what is frequency of A?", "options": {"A": "38", "B": "40", "C": "42", "D": "44"}, "correct_answer": "B"},
    {"id": 86, "difficulty": "hard", "question": "In a class survey, the average frequency of 5 categories is 24. If four categories have frequencies 20, 25, 28, 22, what is the fifth frequency?", "options": {"A": "23", "B": "24", "C": "25", "D": "26"}, "correct_answer": "C"},
    {"id": 87, "difficulty": "hard", "question": "The frequencies of three items are in arithmetic progression with common difference 6. If total is 72, what is the middle frequency?", "options": {"A": "22", "B": "24", "C": "26", "D": "28"}, "correct_answer": "B"},
    {"id": 88, "difficulty": "hard", "question": "If category X has frequency 45 which is 15% more than category Y, what is frequency of Y?", "options": {"A": "38", "B": "39", "C": "40", "D": "41"}, "correct_answer": "B"},
    {"id": 89, "difficulty": "hard", "question": "In a frequency table with 5 categories, the mean is 32 and median is 30. If four categories are 25, 30, 35, 40, what is the fifth frequency?", "options": {"A": "28", "B": "30", "C": "32", "D": "34"}, "correct_answer": "B"},
    {"id": 90, "difficulty": "hard", "question": "The ratio of frequencies P:Q:R is 5:6:7. If frequency of R is 35 more than P, what is total frequency?", "options": {"A": "160", "B": "165", "C": "170", "D": "175"}, "correct_answer": "C"},
    {"id": 91, "difficulty": "hard", "question": "In a survey of 240 people, category A is 3/8 of total, category B is 25%, and category C is the rest. How many people are in category C?", "options": {"A": "65", "B": "68", "C": "70", "D": "72"}, "correct_answer": "C"},
    {"id": 92, "difficulty": "hard", "question": "The frequencies of four items are consecutive multiples of 7 that total 154. What is the frequency of the largest number?", "options": {"A": "42", "B": "44", "C": "46", "D": "48"}, "correct_answer": "A"},
    {"id": 93, "difficulty": "hard", "question": "If category M is 60% of category N, and category N is 40% of total 500, what is frequency of M?", "options": {"A": "115", "B": "118", "C": "120", "D": "122"}, "correct_answer": "C"},
    {"id": 94, "difficulty": "hard", "question": "The average of five frequencies is 28. When a sixth frequency of 38 is added, what is the new average?", "options": {"A": "28.5", "B": "29", "C": "29.5", "D": "30"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "In a frequency table, if A:B = 3:4, B:C = 5:6, and C is 72, what is A?", "options": {"A": "42", "B": "44", "C": "46", "D": "48"}, "correct_answer": "A"},
    {"id": 96, "difficulty": "hard", "question": "The frequencies of three items are in ratio 4:5:6. If the difference between largest and smallest is 24, what is total frequency?", "options": {"A": "170", "B": "175", "C": "180", "D": "185"}, "correct_answer": "C"},
    {"id": 97, "difficulty": "hard", "question": "In a survey, category P is 2/5 of total, category Q is 30%, and category R has 78 items. What is the total frequency?", "options": {"A": "250", "B": "255", "C": "260", "D": "265"}, "correct_answer": "C"},
    {"id": 98, "difficulty": "hard", "question": "The frequencies of four items are consecutive odd numbers that total 160. What is the frequency of the second largest?", "options": {"A": "37", "B": "39", "C": "41", "D": "43"}, "correct_answer": "B"},
    {"id": 99, "difficulty": "hard", "question": "If category X is 25% more than category Y, and category Y is 20% less than category Z, and Z is 100, what is X?", "options": {"A": "95", "B": "98", "C": "100", "D": "102"}, "correct_answer": "C"},
    {"id": 100, "difficulty": "hard", "question": "The ratio of frequencies A:B:C is 2:3:4. If frequency of C is 48, what is the average of A and B?", "options": {"A": "28", "B": "30", "C": "32", "D": "34"}, "correct_answer": "B"}
  ]
}