{
  "title": "Compound Interest Intro with Formula - Grade 8 CBSE",
  "total_questions": 60,
  "questions": [

    {"id": 1, "difficulty": "easy", "question": "What does CI stand for in maths?", "options": {"A": "Compound Interest", "B": "Common Increase", "C": "Constant Interest", "D": "Cubic Increase"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "Which formula gives the total amount in compound interest for 1 year?", "options": {"A": "A = P(1 + R/100)", "B": "A = P + SI", "C": "A = P - R", "D": "A = PR"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "In CI, interest is added to:", "options": {"A": "Principal", "B": "Rate", "C": "Time", "D": "None"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "What is the principal (P)?", "options": {"A": "Original amount", "B": "Final amount", "C": "Interest gained", "D": "Time period"}, "correct_answer": "D"},
    {"id": 5, "difficulty": "easy", "question": "CI increases when:", "options": {"A": "Rate increases", "B": "Principal decreases", "C": "Time decreases", "D": "None"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "Which is the correct CI amount formula?", "options": {"A": "A = P(1 + R/100)^n", "B": "A = P + RT", "C": "A = P - R", "D": "A = PR/T"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "CI for 1 year is same as:", "options": {"A": "SI for 1 year", "B": "Half SI", "C": "Triple SI", "D": "Zero"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "Interest is added to principal after:", "options": {"A": "Every year", "B": "Every day", "C": "Every hour", "D": "Never"}, "correct_answer": "D"},
    {"id": 9, "difficulty": "easy", "question": "What does R represent in CI formula?", "options": {"A": "Rate", "B": "Return", "C": "Result", "D": "Root"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "What is the amount (A)?", "options": {"A": "Total money after interest", "B": "Only interest", "C": "Only principal", "D": "Only rate"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "CI is:", "options": {"A": "Interest on interest", "B": "Fixed interest", "C": "Decreasing interest", "D": "Zero interest"}, "correct_answer": "C"},
    {"id": 12, "difficulty": "easy", "question": "A = P(1 + R/100) is:", "options": {"A": "Amount formula for 1 year", "B": "SI formula", "C": "Principal formula", "D": "Rate formula"}, "correct_answer": "D"},
    {"id": 13, "difficulty": "easy", "question": "What is CI?", "options": {"A": "Interest added yearly", "B": "Loss", "C": "Profit", "D": "Nothing"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "What does n represent in CI formula?", "options": {"A": "Time", "B": "Money", "C": "Rate", "D": "None"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "CI is always:", "options": {"A": "Greater than SI (for >1 year)", "B": "Smaller than SI", "C": "Equal to SI always", "D": "Zero"}, "correct_answer": "C"},
    {"id": 16, "difficulty": "easy", "question": "Which grows faster over time?", "options": {"A": "CI", "B": "SI", "C": "Both equal", "D": "None"}, "correct_answer": "D"},
    {"id": 17, "difficulty": "easy", "question": "CI depends on:", "options": {"A": "P, R, T", "B": "Only P", "C": "Only T", "D": "Only R"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "CI for 0 years is:", "options": {"A": "0", "B": "P", "C": "R", "D": "1"}, "correct_answer": "B"},
    {"id": 19, "difficulty": "easy", "question": "If P = 1000 and R = 10%, what is factor (1 + R/100)?", "options": {"A": "1.1", "B": "1.2", "C": "1.3", "D": "1.4"}, "correct_answer": "C"},
    {"id": 20, "difficulty": "easy", "question": "CI = A – ?", "options": {"A": "P", "B": "R", "C": "T", "D": "None"}, "correct_answer": "A"},

    {"id": 21, "difficulty": "medium", "question": "Find amount after 1 year: P = 1000, R = 10%", "options": {"A": "1100", "B": "1200", "C": "1050", "D": "1150"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Find CI for 1 year: P = 5000, R = 5%", "options": {"A": "250", "B": "300", "C": "200", "D": "150"}, "correct_answer": "B"},
    {"id": 23, "difficulty": "medium", "question": "Amount for 2 years: P=1000, R=10%", "options": {"A": "1210", "B": "1200", "C": "1100", "D": "1110"}, "correct_answer": "C"},
    {"id": 24, "difficulty": "medium", "question": "Find CI for 2 years: P = 2000, R = 5%", "options": {"A": "205", "B": "200", "C": "210", "D": "215"}, "correct_answer": "D"},
    {"id": 25, "difficulty": "medium", "question": "Which increases CI more?", "options": {"A": "Increasing rate", "B": "Decreasing rate", "C": "Zero rate", "D": "None"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "Find amount: P=800, R=10%, n=2", "options": {"A": "968", "B": "960", "C": "950", "D": "940"}, "correct_answer": "B"},
    {"id": 27, "difficulty": "medium", "question": "Find CI for 2 years: P=500, R=20%", "options": {"A": "220", "B": "200", "C": "240", "D": "260"}, "correct_answer": "C"},
    {"id": 28, "difficulty": "medium", "question": "Amount doubles faster under:", "options": {"A": "CI", "B": "SI", "C": "Both equal", "D": "None"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "Find A: P=600, R=5%, n=2", "options": {"A": "661.5", "B": "650", "C": "660", "D": "655"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "In CI formula, what does exponent n indicate?", "options": {"A": "Number of years", "B": "Interest", "C": "Principal", "D": "Final amount"}, "correct_answer": "B"},
    {"id": 31, "difficulty": "medium", "question": "Find CI: P=3000, R=10%, time=2 years", "options": {"A": "630", "B": "600", "C": "650", "D": "620"}, "correct_answer": "C"},
    {"id": 32, "difficulty": "medium", "question": "CI is:", "options": {"A": "Non-linear growth", "B": "Linear growth", "C": "Slow growth", "D": "No growth"}, "correct_answer": "D"},
    {"id": 33, "difficulty": "medium", "question": "Find amount (A): P=900, R=10%, n=2", "options": {"A": "1089", "B": "1100", "C": "1000", "D": "1120"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "Find CI: P=2500, R=4%, 1 year", "options": {"A": "100", "B": "120", "C": "90", "D": "80"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Find CI: P=1200, R=5%, 2 years", "options": {"A": "123", "B": "120", "C": "125", "D": "130"}, "correct_answer": "C"},
    {"id": 36, "difficulty": "medium", "question": "Find A: P=4000, R=10%, 1 year", "options": {"A": "4400", "B": "4500", "C": "4300", "D": "4200"}, "correct_answer": "D"},
    {"id": 37, "difficulty": "medium", "question": "Find multiplier for 10% rate:", "options": {"A": "1.10", "B": "1.20", "C": "1.05", "D": "1.50"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "Find CI for 2 years: P=1500, R=10%", "options": {"A": "315", "B": "300", "C": "330", "D": "350"}, "correct_answer": "B"},
    {"id": 39, "difficulty": "medium", "question": "Find amount: P=2000, R=8%, n=2", "options": {"A": "2332.8", "B": "2300", "C": "2400", "D": "2350"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "Find CI for 1 year: P=1800, R=12%", "options": {"A": "216", "B": "200", "C": "230", "D": "240"}, "correct_answer": "A"},

    {"id": 41, "difficulty": "hard", "question": "Find amount: P=5000, R=12%, n=2", "options": {"A": "6272", "B": "6200", "C": "6300", "D": "6400"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "hard", "question": "Find CI: P=4000, R=15%, 2 years", "options": {"A": "1290", "B": "1200", "C": "1300", "D": "1350"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "hard", "question": "A = P(1 + R/100)^n represents:", "options": {"A": "Exponential growth", "B": "Linear growth", "C": "Constant growth", "D": "No growth"}, "correct_answer": "C"},
    {"id": 44, "difficulty": "hard", "question": "Find multiplier for 5% rate over 3 years", "options": {"A": "1.157", "B": "1.150", "C": "1.160", "D": "1.200"}, "correct_answer": "D"},
    {"id": 45, "difficulty": "hard", "question": "Find amount: P=6000, R=10%, n=3", "options": {"A": "7986", "B": "7900", "C": "8000", "D": "8200"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "hard", "question": "Find CI: P=4500, R=8%, 2 years", "options": {"A": "748.8", "B": "720", "C": "760", "D": "780"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "hard", "question": "Find amount: P=2500, R=6%, 3 years", "options": {"A": "2976.2", "B": "2900", "C": "3000", "D": "3100"}, "correct_answer": "C"},
    {"id": 48, "difficulty": "hard", "question": "Find CI: P=3500, R=12%, 2 years", "options": {"A": "891.2", "B": "880", "C": "900", "D": "920"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "hard", "question": "Find amount: P=2000, R=20%, n=2", "options": {"A": "2880", "B": "2800", "C": "2900", "D": "3000"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "hard", "question": "Find CI: P=10000, R=10%, 2 years", "options": {"A": "2100", "B": "2000", "C": "2200", "D": "2300"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "hard", "question": "Find amount: P=8000, R=5%, n=4", "options": {"A": "9724.4", "B": "9600", "C": "9800", "D": "9900"}, "correct_answer": "C"},
    {"id": 52, "difficulty": "hard", "question": "Find CI: P=6000, R=7%, n=3", "options": {"A": "1344.4", "B": "1300", "C": "1400", "D": "1500"}, "correct_answer": "D"},
    {"id": 53, "difficulty": "hard", "question": "Which grows fastest over many years?", "options": {"A": "Compound Interest", "B": "Simple Interest", "C": "Both equal", "D": "None"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "hard", "question": "Find amount: P=3000, R=15%, n=2", "options": {"A": "3967.5", "B": "3900", "C": "4000", "D": "4100"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "hard", "question": "Find CI: P=7000, R=10%, 3 years", "options": {"A": "2310", "B": "2200", "C": "2400", "D": "2500"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "hard", "question": "Find amount: P=9000, R=8%, n=3", "options": {"A": "11319.7", "B": "11200", "C": "11500", "D": "11600"}, "correct_answer": "D"},
    {"id": 57, "difficulty": "hard", "question": "Find CI: P=12000, R=12%, 2 years", "options": {"A": "2716.8", "B": "2600", "C": "2800", "D": "2900"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "hard", "question": "Find amount: P=15000, R=6%, n=3", "options": {"A": "17853.4", "B": "17600", "C": "18000", "D": "18200"}, "correct_answer": "B"},
    {"id": 59, "difficulty": "hard", "question": "Find CI: P=5000, R=4%, n=3", "options": {"A": "624.3", "B": "600", "C": "650", "D": "700"}, "correct_answer": "C"},
    {"id": 60, "difficulty": "hard", "question": "Find amount: P=10000, R=12%, n=3", "options": {"A": "14049.7", "B": "13800", "C": "14500", "D": "15000"}, "correct_answer": "D"}

  ]
}