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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 701 · 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.In 3 years a boy will be 11 years old. How old was he 3 years ago?
  2. 2.Odd one out: which number is NOT in the 4 times table? (a) 24 (b) 39 (c) 8 (d) 16
  3. 3.9 × 9 = ?1 — what is the missing digit?
  4. 4.48 × 100 =
  5. 5.12345679 × 9 =
  6. 6.What comes next? 1, 3, 5, 7, ? (a) 7 (b) 10 (c) 9 (d) 11
  7. 7.9 × 10 = ?0 — what is the missing digit?
  8. 8.15 × ? = 15000
  9. 9.78?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.123456789 × 8 + 9 =
  11. 11.?182 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.848 × 10 =
  13. 13.792 + 297 =
  14. 14.A piggy bank has 8 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
  15. 15.12 × 8 + 2 =
  16. 16.9 × 8 = ?2 — what is the missing digit?
  17. 17.13 × 1000 =
  18. 18.?586 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.Half of 142 =
  20. 20.?620 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.9 × 10 =
  22. 22.Magic square (every row, column and diagonal has the same total): 19 ? 13 | 16 22 28 | 31 10 25. What is the missing number?
  23. 23.Half of 132 =
  24. 24.If today is Sunday, what day will it be after 15 days? (a) Sunday (b) Thursday (c) Tuesday (d) Monday
  25. 25.What comes next? 18, 27, 36, 45, ? (a) 55 (b) 45 (c) 63 (d) 54
  26. 26.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 102 (c) 98 (d) 100
  27. 27.5 × 9 =
  28. 28.Magic square (every row, column and diagonal has the same total): 16 14 24 | ? 18 10 | 12 22 20. What is the missing number?
  29. 29.89 × 100 =
  30. 30.Odd one out: which number is NOT in the 8 times table? (a) 16 (b) 32 (c) 47 (d) 48
  31. 31.3 × 9 =
  32. 32.Magic square (every row, column and diagonal has the same total): 20 10 12 | 6 14 22 | 16 ? 8. What is the missing number?
  33. 33.1 + 2 + 3 + … + 89 =
  34. 34.I thought of a number, multiplied it by 2 and added 2. I got 14. What was my number?
  35. 35.16 × 1000 =
  36. 36.1 + 2 + 3 + … + 19 =
  37. 37.Double 82 =
  38. 38.If today is Saturday, what day will it be after 71 days? (a) Monday (b) Wednesday (c) Saturday (d) Sunday
  39. 39.32?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  40. 40.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 20 (c) 28 (d) 9

Answer key

  1. 5
  2. 39
  3. 8
  4. 4800
  5. 111111111
  6. 9
  7. 9
  8. 1000
  9. 5
  10. 987654321
  11. 7
  12. 8480
  13. 1089
  14. 48
  15. 98
  16. 7
  17. 13000
  18. 8
  19. 71
  20. 1
  21. 90
  22. 34
  23. 66
  24. Monday
  25. 54
  26. 100
  27. 45
  28. 26
  29. 8900
  30. 47
  31. 27
  32. 18
  33. 4005
  34. 6
  35. 16000
  36. 190
  37. 164
  38. Sunday
  39. 7
  40. 9

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