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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 34 · 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. 1.16 × 4 =
  2. 2.198 + 891 =
  3. 3.9 × 2 = 1? — what is the missing digit?
  4. 4.Take 85 and take away the sum of its digits. What do you get?
  5. 5.If today is Tuesday, what day was it 20 days ago? (a) Saturday (b) Wednesday (c) Thursday (d) Tuesday
  6. 6.28 × ? = 2800
  7. 7.9 × 8 =
  8. 8.1234567 × 9 + 8 =
  9. 9.1 + 2 + 3 + … + 6 =
  10. 10.If today is Sunday, what day will it be after 35 days? (a) Sunday (b) Monday (c) Wednesday (d) Saturday
  11. 11.Half of 34 =
  12. 12.32 × 4 =
  13. 13.1 + 2 + 3 + … + 67 =
  14. 14.If today is Saturday, what day was it 23 days ago? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
  15. 15.9 × 8 = ?2 — what is the missing digit?
  16. 16.26 × 4 =
  17. 17.What comes next? 12, 20, 28, 36, ? (a) 36 (b) 45 (c) 52 (d) 44
  18. 18.7?95 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.4?20 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  20. 20.Take 567. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  21. 21.If today is Monday, what day will it be after 58 days? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
  22. 22.77 × ? = 7700
  23. 23.1 × 9 =
  24. 24.Magic trick! Think of 13. Double it, add 8, halve it, then take away 13. What number do you get?
  25. 25.47?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.Odd one out: which number is NOT in the 8 times table? (a) 48 (b) 32 (c) 64 (d) 44
  27. 27.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
  28. 28.Half of 44 =
  29. 29.Magic square (every row, column and diagonal has the same total): 14 ? 20 | 29 23 17 | 26 11 32. What is the missing number?
  30. 30.25 × 4 =
  31. 31.516? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  32. 32.Magic trick! Think of 8. Double it, add 4, halve it, then take away 8. What number do you get?
  33. 33.If today is Wednesday, what day will it be after 23 days? (a) Monday (b) Saturday (c) Friday (d) Thursday
  34. 34.A girl is 7 years old and her brother is 4 years older. How old will her brother be in 7 years?
  35. 35.Half of 32 =
  36. 36.37 × 27 =
  37. 37.I thought of a number, multiplied it by 3 and added 5. I got 20. What was my number?
  38. 38.Double 29 =
  39. 39.1 + 2 + 3 + … + 58 =
  40. 40.Magic trick! Think of 13. Double it, add 6, halve it, then take away 13. What number do you get?

Answer key

  1. 64
  2. 1089
  3. 8
  4. 72
  5. Wednesday
  6. 100
  7. 72
  8. 11111111
  9. 21
  10. Sunday
  11. 17
  12. 128
  13. 2278
  14. Thursday
  15. 7
  16. 104
  17. 44
  18. 6
  19. 3
  20. 198
  21. Wednesday
  22. 100
  23. 9
  24. 4
  25. 8
  26. 44
  27. 5
  28. 22
  29. 35
  30. 100
  31. 6
  32. 2
  33. Friday
  34. 18
  35. 16
  36. 999
  37. 5
  38. 58
  39. 1711
  40. 3

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