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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 233 · 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. 1.6 × 9 =
  2. 2.1 + 2 + 3 + … + 95 =
  3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
  4. 4.Odd one out: which number is NOT in the 8 times table? (a) 64 (b) 18 (c) 32 (d) 48
  5. 5.95 × 100 =
  6. 6.Magic square (every row, column and diagonal has the same total): ? 23 21 | 27 19 11 | 17 15 25. What is the missing number?
  7. 7.53 × 100 =
  8. 8.7?05 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  9. 9.Magic square (every row, column and diagonal has the same total): 7 2 ? | 8 6 4 | 3 10 5. What is the missing number?
  10. 10.?017 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  11. 11.38?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.1 + 2 + 3 + … + 23 =
  13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  14. 14.Magic trick! Think of 15. Double it, add 10, halve it, then take away 15. What number do you get?
  15. 15.In 2 years a boy will be 14 years old. How old was he 7 years ago?
  16. 16.Magic square (every row, column and diagonal has the same total): ? 18 16 | 22 14 6 | 12 10 20. What is the missing number?
  17. 17.9 × 10 =
  18. 18.Magic square (every row, column and diagonal has the same total): 15 30 ? | 12 18 24 | 27 6 21. What is the missing number?
  19. 19.A girl is 11 years old and her brother is 3 years older. How old will her brother be in 7 years?
  20. 20.507 × 10 =
  21. 21.9 × 4 = 3? — what is the missing digit?
  22. 22.11 × 11 =
  23. 23.6 × 4 =
  24. 24.?736 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  25. 25.9 × 3 =
  26. 26.Half of 142 =
  27. 27.A father is 38 years old and his son is 6. How old was the father when the son was born?
  28. 28.If today is Sunday, what day was it 48 days ago? (a) Sunday (b) Thursday (c) Tuesday (d) Monday
  29. 29.12345679 × 18 =
  30. 30.If today is Sunday, what day will it be after 16 days? (a) Tuesday (b) Wednesday (c) Monday (d) Friday
  31. 31.Take 77 and take away the sum of its digits. What do you get?
  32. 32.9 × 8 = ?2 — what is the missing digit?
  33. 33.54 × 4 =
  34. 34.1 + 2 + 3 + … + 77 =
  35. 35.The ages of two twins add up to 30. How old is each twin?
  36. 36.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 33 (c) 24 (d) 28
  37. 37.1 + 2 + 3 + … + 66 =
  38. 38.1111 × 1111 =
  39. 39.25 × 4 =
  40. 40.If today is Sunday, what day will it be after 35 days? (a) Saturday (b) Sunday (c) Monday (d) Wednesday

Answer key

  1. 54
  2. 4560
  3. 594
  4. 18
  5. 9500
  6. 13
  7. 5300
  8. 6
  9. 9
  10. 1
  11. 4
  12. 276
  13. 693
  14. 5
  15. 5
  16. 8
  17. 90
  18. 9
  19. 21
  20. 5070
  21. 6
  22. 121
  23. 24
  24. 2
  25. 27
  26. 71
  27. 32
  28. Monday
  29. 222222222
  30. Tuesday
  31. 63
  32. 7
  33. 216
  34. 3003
  35. 15
  36. 32
  37. 2211
  38. 1234321
  39. 100
  40. Sunday

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