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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 747 · 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 65 days? (a) Wednesday (b) Sunday (c) Thursday (d) Friday
  2. 2.Double 96 =
  3. 3.Magic square (every row, column and diagonal has the same total): 19 ? 7 | 4 16 28 | 25 10 13. What is the missing number?
  4. 4.1 + 2 + 3 + … + 76 =
  5. 5.1234 × 9 + 5 =
  6. 6.48?1 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  7. 7.1 + 2 + 3 + … + 29 =
  8. 8.Magic square (every row, column and diagonal has the same total): 8 3 4 | ? 5 9 | 6 7 2. What is the missing number?
  9. 9.What comes next? 20, 27, 34, 41, ? (a) 49 (b) 55 (c) 41 (d) 48
  10. 10.6 × 9 =
  11. 11.5 × 1000 =
  12. 12.56?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  13. 13.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
  14. 14.Magic square (every row, column and diagonal has the same total): ? 8 3 | 2 6 10 | 9 4 5. What is the missing number?
  15. 15.Magic square (every row, column and diagonal has the same total): 7 ? 3 | 2 6 10 | 9 4 5. What is the missing number?
  16. 16.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 51 (c) 47 (d) 49
  17. 17.9 × 9 =
  18. 18.9 × 3 =
  19. 19.Think of 3. Multiply it by 2, then add 7. What number do you end with?
  20. 20.A girl is 12 years old and her brother is 6 years older. How old will her brother be in 6 years?
  21. 21.710? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  22. 22.Magic square (every row, column and diagonal has the same total): 4 9 8 | 11 ? 3 | 6 5 10. What is the missing number?
  23. 23.The 5th of a month is a Monday. What day is the 18th of the same month? (a) Wednesday (b) Saturday (c) Monday (d) Sunday
  24. 24.10 × 9 =
  25. 25.Take 639. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  26. 26.5 × 9 =
  27. 27.9 × 10 = 9? — what is the missing digit?
  28. 28.38 × 4 =
  29. 29.9 × 8 = 7? — what is the missing digit?
  30. 30.If today is Sunday, what day was it 54 days ago? (a) Tuesday (b) Wednesday (c) Monday (d) Friday
  31. 31.4 × 9 =
  32. 32.123456 × 8 + 6 =
  33. 33.9 × 10 = ?0 — what is the missing digit?
  34. 34.What comes next? 16, 25, 36, 49, ? (a) 66 (b) 65 (c) 64 (d) 62
  35. 35.1 + 3 + 5 + … + 13 =
  36. 36.Magic square (every row, column and diagonal has the same total): 19 9 23 | 21 ? 13 | 11 25 15. What is the missing number?
  37. 37.40 × 4 =
  38. 38.A piggy bank has 12 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
  39. 39.9 × 8 =
  40. 40.118? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

Answer key

  1. Thursday
  2. 192
  3. 22
  4. 2926
  5. 11111
  6. 5
  7. 435
  8. 1
  9. 48
  10. 54
  11. 5000
  12. 8
  13. 2
  14. 7
  15. 8
  16. 49
  17. 81
  18. 27
  19. 13
  20. 24
  21. 1
  22. 7
  23. Sunday
  24. 90
  25. 297
  26. 45
  27. 0
  28. 152
  29. 2
  30. Tuesday
  31. 36
  32. 987654
  33. 9
  34. 64
  35. 49
  36. 17
  37. 160
  38. 64
  39. 72
  40. 8

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