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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 322 · 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.The 7th of a month is a Sunday. What day is the 28th of the same month? (a) Monday (b) Sunday (c) Wednesday (d) Saturday
  2. 2.1 + 2 + 3 + … + 48 =
  3. 3.Half of 92 =
  4. 4.What comes next? 12, 15, 18, 21, ? (a) 27 (b) 25 (c) 21 (d) 24
  5. 5.4 × 9 =
  6. 6.41 × 4 =
  7. 7.51 × 4 =
  8. 8.12345679 × 9 =
  9. 9.Magic square (every row, column and diagonal has the same total): 23 26 11 | 8 20 32 | 29 ? 17. What is the missing number?
  10. 10.5 × 9 =
  11. 11.61 × ? = 6100
  12. 12.7 × 9 =
  13. 13.Half of 26 =
  14. 14.1 + 2 + 3 + … + 50 =
  15. 15.185 × 10 =
  16. 16.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 42 (d) 49
  17. 17.510 × 10 =
  18. 18.Take 24 and take away the sum of its digits. What do you get?
  19. 19.A father is 31 years old and his son is 6. How old was the father when the son was born?
  20. 20.Magic square (every row, column and diagonal has the same total): 14 7 12 | 9 11 13 | 10 ? 8. What is the missing number?
  21. 21.Double 77 =
  22. 22.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 28 (c) 24 (d) 9
  23. 23.1 + 3 + 5 + … + 47 =
  24. 24.Magic square (every row, column and diagonal has the same total): 9 ? 7 | 4 6 8 | 5 10 3. What is the missing number?
  25. 25.9 × 9 =
  26. 26.1 × 9 =
  27. 27.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 12 (c) 17 (d) 14
  28. 28.12345679 × 54 =
  29. 29.9 × 5 = 4? — what is the missing digit?
  30. 30.Magic square (every row, column and diagonal has the same total): 17 ? 15 | 12 14 16 | 13 18 11. What is the missing number?
  31. 31.33 × 4 =
  32. 32.Magic square (every row, column and diagonal has the same total): 14 12 22 | 24 16 8 | ? 20 18. What is the missing number?
  33. 33.8 × 9 =
  34. 34.42 × 4 =
  35. 35.1 + 2 + 3 + … + 28 =
  36. 36.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  37. 37.A piggy bank has 12 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
  38. 38.9 × 5 =
  39. 39.Magic square (every row, column and diagonal has the same total): 15 30 27 | 36 24 ? | 21 18 33. What is the missing number?
  40. 40.12345679 × 81 =

Answer key

  1. Sunday
  2. 1176
  3. 46
  4. 24
  5. 36
  6. 164
  7. 204
  8. 111111111
  9. 14
  10. 45
  11. 100
  12. 63
  13. 13
  14. 1275
  15. 1850
  16. 48
  17. 5100
  18. 18
  19. 25
  20. 15
  21. 154
  22. 9
  23. 576
  24. 2
  25. 81
  26. 9
  27. 16
  28. 666666666
  29. 5
  30. 10
  31. 132
  32. 10
  33. 72
  34. 168
  35. 406
  36. 891
  37. 70
  38. 45
  39. 12
  40. 999999999

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