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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 628 · 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 Tuesday, what day will it be after 96 days? (a) Sunday (b) Saturday (c) Wednesday (d) Monday
  2. 2.111111 × 111111 =
  3. 3.Double 49 =
  4. 4.Half of 182 =
  5. 5.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹22. How many ₹2 coins do you have?
  6. 6.9 × 2 =
  7. 7.A girl is 9 years old and her brother is 6 years older. How old will her brother be in 8 years?
  8. 8.891 + 198 =
  9. 9.The 1st of a month is a Sunday. What day is the 18th of the same month? (a) Tuesday (b) Saturday (c) Wednesday (d) Thursday
  10. 10.Magic square (every row, column and diagonal has the same total): ? 9 19 | 21 13 5 | 7 17 15. What is the missing number?
  11. 11.Double 15 =
  12. 12.37 × 9 =
  13. 13.21?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  14. 14.Magic square (every row, column and diagonal has the same total): 33 12 27 | 18 24 30 | 21 36 ?. What is the missing number?
  15. 15.Magic trick! Think of 4. Double it, add 6, halve it, then take away 4. What number do you get?
  16. 16.The 4th of a month is a Saturday. What day is the 16th of the same month? (a) Thursday (b) Wednesday (c) Sunday (d) Friday
  17. 17.What comes next? 5, 10, 20, 40, ? (a) 81 (b) 60 (c) 70 (d) 80
  18. 18.12345 × 9 + 6 =
  19. 19.9 × 3 =
  20. 20.If today is Sunday, what day will it be after 12 days? (a) Thursday (b) Saturday (c) Monday (d) Friday
  21. 21.1 + 3 + 5 + … + 35 =
  22. 22.9 × 5 = 4? — what is the missing digit?
  23. 23.269 × ? = 2690
  24. 24.9 × 9 = 8? — what is the missing digit?
  25. 25.Magic square (every row, column and diagonal has the same total): 15 17 7 | 5 ? 21 | 19 9 11. What is the missing number?
  26. 26.9 × 10 = 9? — what is the missing digit?
  27. 27.12 × 8 + 2 =
  28. 28.22 × 1000 =
  29. 29.9 × 3 = 2? — what is the missing digit?
  30. 30.9 × 8 = ?2 — what is the missing digit?
  31. 31.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
  32. 32.I thought of a number, added 7 and then doubled it. I got 42. What was my number?
  33. 33.Magic square (every row, column and diagonal has the same total): 12 7 14 | 13 11 9 | 8 15 ?. What is the missing number?
  34. 34.Think of 14. Multiply it by 3, then add 9. What number do you end with?
  35. 35.Take 40 and take away the sum of its digits. What do you get?
  36. 36.If today is Wednesday, what day was it 20 days ago? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
  37. 37.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 25 (c) 23 (d) 27
  38. 38.693 + 396 =
  39. 39.7 × ? = 700
  40. 40.733 × 10 =

Answer key

  1. Sunday
  2. 12345654321
  3. 98
  4. 91
  5. 10
  6. 18
  7. 23
  8. 1089
  9. Wednesday
  10. 11
  11. 30
  12. 333
  13. 6
  14. 15
  15. 3
  16. Thursday
  17. 80
  18. 111111
  19. 27
  20. Friday
  21. 324
  22. 5
  23. 10
  24. 1
  25. 13
  26. 0
  27. 98
  28. 22000
  29. 7
  30. 7
  31. 1089
  32. 14
  33. 10
  34. 51
  35. 36
  36. Thursday
  37. 25
  38. 1089
  39. 100
  40. 7330

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