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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 28 · 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. 1.9 × 7 =
  2. 2.72 × 100 =
  3. 3.9 × 2 =
  4. 4.What comes next? 16, 25, 36, 49, ? (a) 64 (b) 65 (c) 66 (d) 62
  5. 5.Think of 2. Multiply it by 3, then add 4. What number do you end with?
  6. 6.In 6 years a boy will be 17 years old. How old was he 5 years ago?
  7. 7.1 × 9 =
  8. 8.If today is Saturday, what day will it be after 15 days? (a) Saturday (b) Monday (c) Wednesday (d) Sunday
  9. 9.A piggy bank has 2 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
  10. 10.The 6th of a month is a Sunday. What day is the 23rd of the same month? (a) Tuesday (b) Wednesday (c) Thursday (d) Saturday
  11. 11.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹8. How many ₹2 coins do you have?
  12. 12.9 × 7 = ?3 — what is the missing digit?
  13. 13.495 + 594 =
  14. 14.28 × 4 =
  15. 15.37 × 6 =
  16. 16.26 × 4 =
  17. 17.The 2nd of a month is a Saturday. What day is the 12th of the same month? (a) Wednesday (b) Friday (c) Monday (d) Tuesday
  18. 18.If today is Tuesday, what day will it be after 66 days? (a) Monday (b) Saturday (c) Thursday (d) Friday
  19. 19.Think of 4. Multiply it by 4, then add 3. What number do you end with?
  20. 20.Take 37 and take away the sum of its digits. What do you get?
  21. 21.37 × 21 =
  22. 22.Odd one out: which number is NOT in the 3 times table? (a) 6 (b) 14 (c) 15 (d) 12
  23. 23.I thought of a number, multiplied it by 4 and added 8. I got 60. What was my number?
  24. 24.12345678 × 9 + 9 =
  25. 25.If today is Sunday, what day will it be after 19 days? (a) Thursday (b) Saturday (c) Friday (d) Monday
  26. 26.Odd one out: which number is NOT in the 4 times table? (a) 36 (b) 28 (c) 16 (d) 19
  27. 27.1 + 2 + 3 + … + 41 =
  28. 28.Do the 1089 trick with 884: reverse and subtract, then reverse that answer and add. What do you get?
  29. 29.1 + 2 + 3 + … + 42 =
  30. 30.A girl is 11 years old and her brother is 6 years older. How old will her brother be in 4 years?
  31. 31.198 + 891 =
  32. 32.5 × 9 =
  33. 33.5?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.A girl is 7 years old and her brother is 4 years older. How old will her brother be in 9 years?
  35. 35.Take 70 and take away the sum of its digits. What do you get?
  36. 36.9 × 5 = ?5 — what is the missing digit?
  37. 37.19 × 4 =
  38. 38.?134 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.What comes next? 13, 21, 29, 37, ? (a) 37 (b) 46 (c) 45 (d) 53
  40. 40.47 × 4 =

Answer key

  1. 63
  2. 7200
  3. 18
  4. 64
  5. 10
  6. 6
  7. 9
  8. Sunday
  9. 30
  10. Wednesday
  11. 3
  12. 6
  13. 1089
  14. 112
  15. 222
  16. 104
  17. Tuesday
  18. Friday
  19. 19
  20. 27
  21. 777
  22. 14
  23. 13
  24. 111111111
  25. Friday
  26. 19
  27. 861
  28. 1089
  29. 903
  30. 21
  31. 1089
  32. 45
  33. 9
  34. 20
  35. 63
  36. 4
  37. 76
  38. 1
  39. 45
  40. 188

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