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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 228 · 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.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 47 (c) 51 (d) 49
  2. 2.9 × 9 = ?1 — what is the missing digit?
  3. 3.297 + 792 =
  4. 4.44 × 4 =
  5. 5.I thought of a number, added 8 and then doubled it. I got 34. What was my number?
  6. 6.9 × 1 =
  7. 7.40 × 4 =
  8. 8.9 × 8 = 7? — what is the missing digit?
  9. 9.57 × 4 =
  10. 10.Take 25 and take away the sum of its digits. What do you get?
  11. 11.Magic square (every row, column and diagonal has the same total): 9 ? 11 | 10 8 6 | 5 12 7. What is the missing number?
  12. 12.9 × 9 = 8? — what is the missing digit?
  13. 13.A piggy bank has 12 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
  14. 14.Magic trick! Think of 2. Double it, add 6, halve it, then take away 2. What number do you get?
  15. 15.The 7th of a month is a Sunday. What day is the 22nd of the same month? (a) Thursday (b) Tuesday (c) Sunday (d) Monday
  16. 16.51 × ? = 510
  17. 17.1 × 9 =
  18. 18.754? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.9 × 9 =
  20. 20.Magic square (every row, column and diagonal has the same total): 18 21 6 | 3 ? 27 | 24 9 12. What is the missing number?
  21. 21.If today is Sunday, what day will it be after 31 days? (a) Thursday (b) Saturday (c) Tuesday (d) Wednesday
  22. 22.37 × 9 =
  23. 23.9 × 3 = ?7 — what is the missing digit?
  24. 24.9 × 5 = ?5 — what is the missing digit?
  25. 25.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  26. 26.Magic trick! Think of 9. Double it, add 4, halve it, then take away 9. What number do you get?
  27. 27.6 × 9 =
  28. 28.Magic trick! Think of 11. Double it, add 18, halve it, then take away 11. What number do you get?
  29. 29.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 25 (c) 23 (d) 27
  30. 30.A girl is 7 years old and her brother is 2 years older. How old will her brother be in 3 years?
  31. 31.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  32. 32.If today is Thursday, what day was it 57 days ago? (a) Wednesday (b) Thursday (c) Tuesday (d) Saturday
  33. 33.9 × 8 = ?2 — what is the missing digit?
  34. 34.9 × 6 =
  35. 35.9 × 4 = ?6 — what is the missing digit?
  36. 36.1 + 2 + 3 + … + 97 =
  37. 37.Odd one out: which number is NOT in the 5 times table? (a) 10 (b) 15 (c) 20 (d) 11
  38. 38.What comes next? 36, 49, 64, 81, ? (a) 98 (b) 101 (c) 102 (d) 100
  39. 39.Half of 152 =
  40. 40.A piggy bank has 7 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?

Answer key

  1. 49
  2. 8
  3. 1089
  4. 176
  5. 9
  6. 9
  7. 160
  8. 2
  9. 228
  10. 18
  11. 4
  12. 1
  13. 88
  14. 3
  15. Monday
  16. 10
  17. 9
  18. 2
  19. 81
  20. 15
  21. Wednesday
  22. 333
  23. 2
  24. 4
  25. 198
  26. 2
  27. 54
  28. 9
  29. 25
  30. 12
  31. 594
  32. Wednesday
  33. 7
  34. 54
  35. 3
  36. 4753
  37. 11
  38. 100
  39. 76
  40. 43

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