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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 359 · 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. 1.24 × 4 =
  2. 2.Magic square (every row, column and diagonal has the same total): 15 30 27 | 36 24 12 | 21 18 ?. What is the missing number?
  3. 3.2 × 9 =
  4. 4.Magic square (every row, column and diagonal has the same total): 18 ? 12 | 15 21 27 | 30 9 24. What is the missing number?
  5. 5.Half of 34 =
  6. 6.56 × 4 =
  7. 7.If today is Friday, what day will it be after 39 days? (a) Tuesday (b) Wednesday (c) Friday (d) Monday
  8. 8.Half of 116 =
  9. 9.12345679 × 72 =
  10. 10.9 × 10 = 9? — what is the missing digit?
  11. 11.769 × 10 =
  12. 12.12345679 × 54 =
  13. 13.?727 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  14. 14.9 × 9 = ?1 — what is the missing digit?
  15. 15.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 24 (c) 17 (d) 20
  16. 16.Magic square (every row, column and diagonal has the same total): 21 6 27 | 24 18 12 | 9 ? 15. What is the missing number?
  17. 17.Half of 162 =
  18. 18.1 + 2 + 3 + … + 36 =
  19. 19.Magic square (every row, column and diagonal has the same total): 12 7 8 | 5 9 13 | 10 11 ?. What is the missing number?
  20. 20.123456 × 8 + 6 =
  21. 21.37 × 12 =
  22. 22.1 × 9 =
  23. 23.A girl is 12 years old and her brother is 6 years older. How old will her brother be in 4 years?
  24. 24.A girl is 10 years old and her brother is 4 years older. How old will her brother be in 4 years?
  25. 25.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹19. How many ₹2 coins do you have?
  26. 26.?800 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  27. 27.6 × 9 =
  28. 28.Think of 5. Multiply it by 3, then add 8. What number do you end with?
  29. 29.1111 × 1111 =
  30. 30.12 × 4 =
  31. 31.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
  33. 33.905 × 10 =
  34. 34.Take 68 and take away the sum of its digits. What do you get?
  35. 35.9 × 2 = ?8 — what is the missing digit?
  36. 36.In 2 years a boy will be 14 years old. How old was he 2 years ago?
  37. 37.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 24 (c) 33 (d) 28
  38. 38.12345678 × 8 + 8 =
  39. 39.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
  40. 40.The 3rd of a month is a Monday. What day is the 13th of the same month? (a) Sunday (b) Wednesday (c) Friday (d) Thursday

Answer key

  1. 96
  2. 33
  3. 18
  4. 33
  5. 17
  6. 224
  7. Tuesday
  8. 58
  9. 888888888
  10. 0
  11. 7690
  12. 666666666
  13. 2
  14. 8
  15. 17
  16. 30
  17. 81
  18. 666
  19. 6
  20. 987654
  21. 444
  22. 9
  23. 22
  24. 18
  25. 7
  26. 1
  27. 54
  28. 23
  29. 1234321
  30. 48
  31. 297
  32. 594
  33. 9050
  34. 54
  35. 1
  36. 10
  37. 32
  38. 98765432
  39. 1089
  40. Thursday

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