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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 697 · 40 questions
TalentJR

The trick (Choose a trick): × 9 → finger trick; × 4 → double double; × 10, 100, 1000 → slide and add zeros. 37, 12345679 or 111… → magic patterns; reverse and subtract → 1089. Puzzles: find the rule, the total or the leftover days, then check your answer.

NameDateTime takenScore ___ / 40
  1. 1.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  2. 2.58 × 4 =
  3. 3.Take 23 and take away the sum of its digits. What do you get?
  4. 4.I thought of a number, multiplied it by 3 and added 2. I got 23. What was my number?
  5. 5.If today is Saturday, what day was it 53 days ago? (a) Wednesday (b) Monday (c) Tuesday (d) Friday
  6. 6.Magic trick! Think of 10. Double it, add 10, halve it, then take away 10. What number do you get?
  7. 7.29 × 4 =
  8. 8.Magic trick! Think of 16. Double it, add 4, halve it, then take away 16. What number do you get?
  9. 9.495 + 594 =
  10. 10.26 × ? = 26000
  11. 11.1 + 2 + 3 + … + 27 =
  12. 12.9 × 2 = ?8 — what is the missing digit?
  13. 13.1 + 2 + 3 + … + 99 =
  14. 14.If today is Sunday, what day will it be after 88 days? (a) Wednesday (b) Thursday (c) Sunday (d) Friday
  15. 15.Double 56 =
  16. 16.A piggy bank has 11 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
  17. 17.792 + 297 =
  18. 18.What comes next? 5, 9, 13, 17, ? (a) 25 (b) 22 (c) 21 (d) 17
  19. 19.The 3rd of a month is a Tuesday. What day is the 19th of the same month? (a) Sunday (b) Wednesday (c) Friday (d) Thursday
  20. 20.37 × 6 =
  21. 21.18 × 4 =
  22. 22.Odd one out: which number is NOT in the 3 times table? (a) 11 (b) 12 (c) 18 (d) 6
  23. 23.The 7th of a month is a Wednesday. What day is the 15th of the same month? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
  24. 24.15 × 100 =
  25. 25.9 × 7 = ?3 — what is the missing digit?
  26. 26.Half of 158 =
  27. 27.Take 43 and take away the sum of its digits. What do you get?
  28. 28.Magic square (every row, column and diagonal has the same total): 15 16 11 | 10 14 18 | ? 12 13. What is the missing number?
  29. 29.9 × 5 = 4? — what is the missing digit?
  30. 30.123456 × 9 + 7 =
  31. 31.297 + 792 =
  32. 32.2 × 9 =
  33. 33.37 × 4 =
  34. 34.9 × 6 =
  35. 35.19 × 4 =
  36. 36.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 65 (c) 56 (d) 64
  37. 37.9 × 8 =
  38. 38.Half of 104 =
  39. 39.1234 × 9 + 5 =
  40. 40.Half of 28 =

Answer key

  1. 2
  2. 232
  3. 18
  4. 7
  5. Tuesday
  6. 5
  7. 116
  8. 2
  9. 1089
  10. 1000
  11. 378
  12. 1
  13. 4950
  14. Thursday
  15. 112
  16. 61
  17. 1089
  18. 21
  19. Thursday
  20. 222
  21. 72
  22. 11
  23. Thursday
  24. 1500
  25. 6
  26. 79
  27. 36
  28. 17
  29. 5
  30. 1111111
  31. 1089
  32. 18
  33. 148
  34. 54
  35. 76
  36. 64
  37. 72
  38. 52
  39. 11111
  40. 14

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