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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 736 · 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. 1.12345679 × 72 =
  2. 2.Double 41 =
  3. 3.What comes next? 17, 26, 35, 44, ? (a) 54 (b) 62 (c) 44 (d) 53
  4. 4.37 × 9 =
  5. 5.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
  6. 6.9 × 8 = ?2 — what is the missing digit?
  7. 7.What comes next? 4, 10, 16, 22, ? (a) 28 (b) 29 (c) 34 (d) 22
  8. 8.Magic square (every row, column and diagonal has the same total): 11 ? 15 | 18 14 10 | 13 12 17. What is the missing number?
  9. 9.40 × 100 =
  10. 10.1 + 3 + 5 + … + 17 =
  11. 11.10 × 4 =
  12. 12.If today is Sunday, what day will it be after 72 days? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
  13. 13.1 + 2 + 3 + … + 27 =
  14. 14.The 8th of a month is a Wednesday. What day is the 28th of the same month? (a) Monday (b) Friday (c) Tuesday (d) Wednesday
  15. 15.9 × 6 = ?4 — what is the missing digit?
  16. 16.9 × 10 = ?0 — what is the missing digit?
  17. 17.45?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  18. 18.1 + 2 + 3 + … + 44 =
  19. 19.30 × 1000 =
  20. 20.What comes next? 17, 24, 31, 38, ? (a) 52 (b) 38 (c) 46 (d) 45
  21. 21.If today is Sunday, what day was it 21 days ago? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
  22. 22.Double 62 =
  23. 23.?545 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  24. 24.Odd one out: which number is NOT in the 8 times table? (a) 48 (b) 56 (c) 70 (d) 24
  25. 25.If today is Sunday, what day will it be after 86 days? (a) Friday (b) Monday (c) Wednesday (d) Tuesday
  26. 26.The 3rd of a month is a Saturday. What day is the 24th of the same month? (a) Tuesday (b) Friday (c) Sunday (d) Saturday
  27. 27.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  28. 28.43 × 4 =
  29. 29.Odd one out: which number is NOT in the 9 times table? (a) 36 (b) 33 (c) 63 (d) 81
  30. 30.31 × 4 =
  31. 31.Magic trick! Think of 9. Double it, add 14, halve it, then take away 9. What number do you get?
  32. 32.30 × 4 =
  33. 33.1 + 2 + 3 + … + 17 =
  34. 34.Magic square (every row, column and diagonal has the same total): 14 35 20 | 29 23 17 | ? 11 32. What is the missing number?
  35. 35.12345679 × 81 =
  36. 36.The 6th of a month is a Saturday. What day is the 16th of the same month? (a) Wednesday (b) Monday (c) Tuesday (d) Friday
  37. 37.The ages of two twins add up to 24. How old is each twin?
  38. 38.9 × 6 =
  39. 39.11 × 4 =
  40. 40.3?50 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

Answer key

  1. 888888888
  2. 82
  3. 53
  4. 333
  5. 1
  6. 7
  7. 28
  8. 16
  9. 4000
  10. 81
  11. 40
  12. Tuesday
  13. 378
  14. Tuesday
  15. 5
  16. 9
  17. 4
  18. 990
  19. 30000
  20. 45
  21. Sunday
  22. 124
  23. 4
  24. 70
  25. Tuesday
  26. Saturday
  27. 792
  28. 172
  29. 33
  30. 124
  31. 7
  32. 120
  33. 153
  34. 26
  35. 999999999
  36. Tuesday
  37. 12
  38. 54
  39. 44
  40. 1

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