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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 567 · 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.What comes next? 20, 27, 34, 41, ? (a) 41 (b) 49 (c) 48 (d) 55
  2. 2.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  3. 3.Odd one out: which number is NOT in the 6 times table? (a) 42 (b) 24 (c) 52 (d) 12
  4. 4.1 + 2 + 3 + … + 81 =
  5. 5.Take 32 and take away the sum of its digits. What do you get?
  6. 6.If today is Wednesday, what day will it be after 86 days? (a) Monday (b) Thursday (c) Saturday (d) Friday
  7. 7.49 × 4 =
  8. 8.18 × 4 =
  9. 9.Double 32 =
  10. 10.66 × ? = 6600
  11. 11.1 + 3 + 5 + … + 15 =
  12. 12.26 × ? = 26000
  13. 13.I thought of a number, multiplied it by 2 and added 1. I got 9. What was my number?
  14. 14.37 × 15 =
  15. 15.2 × 9 =
  16. 16.6 × 4 =
  17. 17.Think of 5. Multiply it by 5, then add 2. What number do you end with?
  18. 18.If today is Friday, what day was it 31 days ago? (a) Friday (b) Tuesday (c) Monday (d) Wednesday
  19. 19.12345679 × 81 =
  20. 20.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹21. How many ₹2 coins do you have?
  21. 21.What comes next? 8, 13, 18, 23, ? (a) 28 (b) 33 (c) 23 (d) 29
  22. 22.Magic square (every row, column and diagonal has the same total): ? 5 15 | 9 13 17 | 11 21 7. What is the missing number?
  23. 23.1 + 2 + 3 + … + 23 =
  24. 24.What comes next? 1, 9, 17, 25, ? (a) 41 (b) 34 (c) 33 (d) 25
  25. 25.1234567 × 8 + 7 =
  26. 26.Magic square (every row, column and diagonal has the same total): ? 4 11 | 10 8 6 | 5 12 7. What is the missing number?
  27. 27.513 × ? = 5130
  28. 28.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  29. 29.Half of 118 =
  30. 30.3 × 9 =
  31. 31.10 × 9 =
  32. 32.If today is Friday, what day will it be after 68 days? (a) Thursday (b) Wednesday (c) Tuesday (d) Saturday
  33. 33.123 × 9 + 4 =
  34. 34.1 + 2 + 3 + … + 100 =
  35. 35.7 × 9 =
  36. 36.Magic square (every row, column and diagonal has the same total): 15 5 19 | 17 13 ? | 7 21 11. What is the missing number?
  37. 37.Odd one out: which number is NOT in the 7 times table? (a) 49 (b) 14 (c) 65 (d) 35
  38. 38.2?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.12345679 × 36 =
  40. 40.21 × 1000 =

Answer key

  1. 48
  2. 4
  3. 52
  4. 3321
  5. 27
  6. Friday
  7. 196
  8. 72
  9. 64
  10. 100
  11. 64
  12. 1000
  13. 4
  14. 555
  15. 18
  16. 24
  17. 27
  18. Tuesday
  19. 999999999
  20. 10
  21. 28
  22. 19
  23. 276
  24. 33
  25. 9876543
  26. 9
  27. 10
  28. 594
  29. 59
  30. 27
  31. 90
  32. Wednesday
  33. 1111
  34. 5050
  35. 63
  36. 9
  37. 65
  38. 8
  39. 444444444
  40. 21000

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