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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 759 · 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.Double 78 =
  2. 2.74 × 100 =
  3. 3.9 × 4 = 3? — what is the missing digit?
  4. 4.The 2nd of a month is a Tuesday. What day is the 24th of the same month? (a) Tuesday (b) Saturday (c) Wednesday (d) Thursday
  5. 5.111111 × 111111 =
  6. 6.1 + 2 + 3 + … + 13 =
  7. 7.19 × 100 =
  8. 8.A girl is 12 years old and her brother is 5 years older. How old will her brother be in 2 years?
  9. 9.A father is 35 years old and his son is 10. How old was the father when the son was born?
  10. 10.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
  11. 11.27 × ? = 2700
  12. 12.6 × 9 =
  13. 13.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 27 (c) 23 (d) 26
  14. 14.The ages of two twins add up to 18. How old is each twin?
  15. 15.12345679 × 45 =
  16. 16.50 × 4 =
  17. 17.62 × 100 =
  18. 18.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹26. How many ₹2 coins do you have?
  19. 19.12345678 × 9 + 9 =
  20. 20.Magic square (every row, column and diagonal has the same total): 10 5 12 | 11 9 7 | 6 13 ?. What is the missing number?
  21. 21.37 × 12 =
  22. 22.Half of 182 =
  23. 23.60 × 100 =
  24. 24.9 × 4 =
  25. 25.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 48 (c) 56 (d) 65
  26. 26.Half of 54 =
  27. 27.The ages of two twins add up to 14. How old is each twin?
  28. 28.1 + 2 + 3 + … + 32 =
  29. 29.1234 × 9 + 5 =
  30. 30.Do the 1089 trick with 587: reverse and subtract, then reverse that answer and add. What do you get?
  31. 31.Magic square (every row, column and diagonal has the same total): 24 9 ? | 3 15 27 | 18 21 6. What is the missing number?
  32. 32.?376 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.592? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  34. 34.Take 67 and take away the sum of its digits. What do you get?
  35. 35.42 × 4 =
  36. 36.What comes next? 9, 12, 15, 18, ? (a) 22 (b) 21 (c) 24 (d) 18
  37. 37.58 × 4 =
  38. 38.37 × 9 =
  39. 39.31? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  40. 40.A girl is 9 years old and her brother is 6 years older. How old will her brother be in 9 years?

Answer key

  1. 156
  2. 7400
  3. 6
  4. Wednesday
  5. 12345654321
  6. 91
  7. 1900
  8. 19
  9. 25
  10. 2
  11. 100
  12. 54
  13. 25
  14. 9
  15. 555555555
  16. 200
  17. 6200
  18. 11
  19. 111111111
  20. 8
  21. 444
  22. 91
  23. 6000
  24. 36
  25. 64
  26. 27
  27. 7
  28. 528
  29. 11111
  30. 1089
  31. 12
  32. 2
  33. 2
  34. 54
  35. 168
  36. 21
  37. 232
  38. 333
  39. 5
  40. 24

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