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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 170 · 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.If today is Thursday, what day was it 47 days ago? (a) Tuesday (b) Sunday (c) Saturday (d) Friday
  2. 2.5 × 1000 =
  3. 3.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  4. 4.9 × 2 = 1? — what is the missing digit?
  5. 5.9 × 2 =
  6. 6.9 × 7 = ?3 — what is the missing digit?
  7. 7.9 × 3 = 2? — what is the missing digit?
  8. 8.7 × 9 =
  9. 9.Odd one out: which number is NOT in the 7 times table? (a) 28 (b) 49 (c) 42 (d) 30
  10. 10.Take 48 and take away the sum of its digits. What do you get?
  11. 11.Half of 58 =
  12. 12.9 × 3 = ?7 — what is the missing digit?
  13. 13.Magic square (every row, column and diagonal has the same total): 7 12 11 | ? 10 6 | 9 8 13. What is the missing number?
  14. 14.?69 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  15. 15.9 × 5 = 4? — what is the missing digit?
  16. 16.?503 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.9 × 8 = 7? — what is the missing digit?
  18. 18.Half of 44 =
  19. 19.26 × 4 =
  20. 20.If today is Wednesday, what day will it be after 67 days? (a) Wednesday (b) Saturday (c) Sunday (d) Monday
  21. 21.A girl is 6 years old and her brother is 6 years older. How old will her brother be in 3 years?
  22. 22.Double 73 =
  23. 23.123 × 9 + 4 =
  24. 24.7 × 4 =
  25. 25.9 × 5 =
  26. 26.9 × 10 = 9? — what is the missing digit?
  27. 27.9 × 5 = ?5 — what is the missing digit?
  28. 28.14 × 4 =
  29. 29.1 + 2 + 3 + … + 85 =
  30. 30.Magic square (every row, column and diagonal has the same total): 13 15 5 | ? 11 19 | 17 7 9. What is the missing number?
  31. 31.If today is Friday, what day will it be after 34 days? (a) Thursday (b) Friday (c) Sunday (d) Wednesday
  32. 32.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  33. 33.1234 × 9 + 5 =
  34. 34.What comes next? 36, 49, 64, 81, ? (a) 100 (b) 101 (c) 98 (d) 102
  35. 35.If today is Wednesday, what day was it 40 days ago? (a) Saturday (b) Thursday (c) Friday (d) Monday
  36. 36.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
  37. 37.A girl is 7 years old and her brother is 3 years older. How old will her brother be in 2 years?
  38. 38.Double 36 =
  39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
  40. 40.Double 57 =

Answer key

  1. Saturday
  2. 5000
  3. 891
  4. 8
  5. 18
  6. 6
  7. 7
  8. 63
  9. 30
  10. 36
  11. 29
  12. 2
  13. 14
  14. 3
  15. 5
  16. 1
  17. 2
  18. 22
  19. 104
  20. Sunday
  21. 15
  22. 146
  23. 1111
  24. 28
  25. 45
  26. 0
  27. 4
  28. 56
  29. 3655
  30. 3
  31. Thursday
  32. 396
  33. 11111
  34. 100
  35. Friday
  36. 4
  37. 12
  38. 72
  39. 594
  40. 114

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