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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 198 · 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 × 7 = ?3 — what is the missing digit?
  2. 2.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 34 (c) 38 (d) 36
  3. 3.Take 399. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  4. 4.11 × 4 =
  5. 5.A girl is 8 years old and her brother is 2 years older. How old will her brother be in 5 years?
  6. 6.I thought of a number, added 8 and then doubled it. I got 54. What was my number?
  7. 7.9 × 6 = 5? — what is the missing digit?
  8. 8.12345679 × 54 =
  9. 9.22 × 1000 =
  10. 10.1 + 2 + 3 + … + 21 =
  11. 11.305? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.9 × 2 = ?8 — what is the missing digit?
  13. 13.6 × 9 =
  14. 14.Half of 176 =
  15. 15.3 × 9 =
  16. 16.697 × 10 =
  17. 17.Magic square (every row, column and diagonal has the same total): 7 12 5 | 6 8 10 | 11 ? 9. What is the missing number?
  18. 18.Magic trick! Think of 18. Double it, add 8, halve it, then take away 18. What number do you get?
  19. 19.The 8th of a month is a Thursday. What day is the 21st of the same month? (a) Thursday (b) Wednesday (c) Saturday (d) Tuesday
  20. 20.1 × 9 =
  21. 21.Odd one out: which number is NOT in the 9 times table? (a) 63 (b) 54 (c) 36 (d) 56
  22. 22.9 × 9 =
  23. 23.Take 26 and take away the sum of its digits. What do you get?
  24. 24.If today is Saturday, what day will it be after 67 days? (a) Wednesday (b) Tuesday (c) Thursday (d) Saturday
  25. 25.A piggy bank has 7 coins of ₹5 and 7 coins of ₹2. How many rupees are in it?
  26. 26.Magic square (every row, column and diagonal has the same total): 10 8 18 | 20 ? 4 | 6 16 14. What is the missing number?
  27. 27.558? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  28. 28.Think of 5. Multiply it by 2, then add 6. What number do you end with?
  29. 29.1 + 3 + 5 + … + 47 =
  30. 30.Magic trick! Think of 3. Double it, add 14, halve it, then take away 3. What number do you get?
  31. 31.Magic square (every row, column and diagonal has the same total): 24 ? 30 | 27 21 15 | 12 33 18. What is the missing number?
  32. 32.9 × 8 =
  33. 33.34 × 1000 =
  34. 34.1234567 × 8 + 7 =
  35. 35.What comes next? 2, 4, 8, 16, ? (a) 24 (b) 28 (c) 33 (d) 32
  36. 36.27 × 4 =
  37. 37.44 × ? = 44000
  38. 38.612 × 10 =
  39. 39.9 × 7 = 6? — what is the missing digit?
  40. 40.9 × 9 = ?1 — what is the missing digit?

Answer key

  1. 6
  2. 36
  3. 594
  4. 44
  5. 15
  6. 19
  7. 4
  8. 666666666
  9. 22000
  10. 231
  11. 1
  12. 1
  13. 54
  14. 88
  15. 27
  16. 6970
  17. 4
  18. 4
  19. Wednesday
  20. 9
  21. 56
  22. 81
  23. 18
  24. Wednesday
  25. 49
  26. 12
  27. 9
  28. 16
  29. 576
  30. 7
  31. 9
  32. 72
  33. 34000
  34. 9876543
  35. 32
  36. 108
  37. 1000
  38. 6120
  39. 3
  40. 8

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