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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 222 · 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 × 2 =
  2. 2.Odd one out: which number is NOT in the 9 times table? (a) 45 (b) 27 (c) 42 (d) 36
  3. 3.53 × 4 =
  4. 4.Think of 4. Multiply it by 5, then add 6. What number do you end with?
  5. 5.Double 32 =
  6. 6.4 × 9 =
  7. 7.12345679 × 36 =
  8. 8.123 × 8 + 3 =
  9. 9.Think of 12. Multiply it by 2, then add 5. What number do you end with?
  10. 10.6 × 9 =
  11. 11.12345 × 9 + 6 =
  12. 12.67 × 100 =
  13. 13.If today is Saturday, what day will it be after 80 days? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
  14. 14.The ages of two twins add up to 28. How old is each twin?
  15. 15.9 × 9 = 8? — what is the missing digit?
  16. 16.9 × 9 =
  17. 17.9 × 4 = 3? — what is the missing digit?
  18. 18.1 + 2 + 3 + … + 64 =
  19. 19.11 × 11 =
  20. 20.2?18 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.Odd one out: which number is NOT in the 5 times table? (a) 20 (b) 40 (c) 41 (d) 35
  22. 22.If today is Wednesday, what day will it be after 57 days? (a) Thursday (b) Friday (c) Wednesday (d) Sunday
  23. 23.9 × 3 = 2? — what is the missing digit?
  24. 24.Magic square (every row, column and diagonal has the same total): 17 7 ? | 3 11 19 | 13 15 5. What is the missing number?
  25. 25.What comes next? 25, 36, 49, 64, ? (a) 83 (b) 81 (c) 79 (d) 82
  26. 26.1 + 3 + 5 + … + 27 =
  27. 27.87?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  28. 28.What comes next? 9, 17, 25, 33, ? (a) 33 (b) 42 (c) 41 (d) 49
  29. 29.1 × 9 =
  30. 30.1234567 × 9 + 8 =
  31. 31.Think of 11. Multiply it by 5, then add 2. What number do you end with?
  32. 32.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  33. 33.Magic trick! Think of 20. Double it, add 6, halve it, then take away 20. What number do you get?
  34. 34.1 + 2 + 3 + … + 33 =
  35. 35.Odd one out: which number is NOT in the 8 times table? (a) 56 (b) 17 (c) 72 (d) 32
  36. 36.37 × 18 =
  37. 37.9 × 5 = 4? — what is the missing digit?
  38. 38.3 × 9 =
  39. 39.9 × 4 =
  40. 40.21 × 100 =

Answer key

  1. 18
  2. 42
  3. 212
  4. 26
  5. 64
  6. 36
  7. 444444444
  8. 987
  9. 29
  10. 54
  11. 111111
  12. 6700
  13. Tuesday
  14. 14
  15. 1
  16. 81
  17. 6
  18. 2080
  19. 121
  20. 7
  21. 41
  22. Thursday
  23. 7
  24. 9
  25. 81
  26. 196
  27. 3
  28. 41
  29. 9
  30. 11111111
  31. 57
  32. 3
  33. 3
  34. 561
  35. 17
  36. 666
  37. 5
  38. 27
  39. 36
  40. 2100

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