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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 442 · 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. 1.123 × 8 + 3 =
  2. 2.21 × 4 =
  3. 3.Half of 16 =
  4. 4.What comes next? 36, 49, 64, 81, ? (a) 100 (b) 98 (c) 101 (d) 102
  5. 5.If today is Sunday, what day was it 58 days ago? (a) Thursday (b) Friday (c) Monday (d) Saturday
  6. 6.?800 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  7. 7.A piggy bank has 3 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
  8. 8.10 × 1000 =
  9. 9.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 37 (c) 38 (d) 34
  10. 10.37 × 10 =
  11. 11.35 × 1000 =
  12. 12.1 + 2 + 3 + … + 64 =
  13. 13.A piggy bank has 9 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
  14. 14.12345679 × 63 =
  15. 15.1111 × 1111 =
  16. 16.6 × 9 =
  17. 17.9 × 9 = ?1 — what is the missing digit?
  18. 18.5 × 9 =
  19. 19.Odd one out: which number is NOT in the 4 times table? (a) 18 (b) 28 (c) 12 (d) 16
  20. 20.?692 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.Take 68 and take away the sum of its digits. What do you get?
  22. 22.A father is 37 years old and his son is 4. How old was the father when the son was born?
  23. 23.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  24. 24.Think of 12. Multiply it by 3, then add 2. What number do you end with?
  25. 25.If today is Sunday, what day was it 29 days ago? (a) Sunday (b) Tuesday (c) Saturday (d) Friday
  26. 26.What comes next? 18, 21, 24, 27, ? (a) 31 (b) 27 (c) 33 (d) 30
  27. 27.9 × 7 = ?3 — what is the missing digit?
  28. 28.9 × 10 = 9? — what is the missing digit?
  29. 29.Magic square (every row, column and diagonal has the same total): ? 16 19 | 10 22 34 | 25 28 13. What is the missing number?
  30. 30.2?50 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  31. 31.In 5 years a boy will be 16 years old. How old was he 4 years ago?
  32. 32.Double 11 =
  33. 33.37 × 1000 =
  34. 34.Magic trick! Think of 11. Double it, add 12, halve it, then take away 11. What number do you get?
  35. 35.Magic square (every row, column and diagonal has the same total): 13 18 11 | 12 14 16 | 17 10 ?. What is the missing number?
  36. 36.9 × 2 = ?8 — what is the missing digit?
  37. 37.9 × 10 = ?0 — what is the missing digit?
  38. 38.9 × 9 =
  39. 39.If today is Sunday, what day will it be after 100 days? (a) Wednesday (b) Friday (c) Tuesday (d) Monday
  40. 40.12345679 × 81 =

Answer key

  1. 987
  2. 84
  3. 8
  4. 100
  5. Friday
  6. 1
  7. 27
  8. 10000
  9. 36
  10. 370
  11. 35000
  12. 2080
  13. 57
  14. 777777777
  15. 1234321
  16. 54
  17. 8
  18. 45
  19. 18
  20. 1
  21. 54
  22. 33
  23. 495
  24. 38
  25. Saturday
  26. 30
  27. 6
  28. 0
  29. 31
  30. 2
  31. 7
  32. 22
  33. 37000
  34. 6
  35. 15
  36. 1
  37. 9
  38. 81
  39. Tuesday
  40. 999999999

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