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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 193 · 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. 1.40 × ? = 40000
  2. 2.9 × 3 = 2? — what is the missing digit?
  3. 3.If today is Friday, what day will it be after 67 days? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
  4. 4.9 × 5 = 4? — what is the missing digit?
  5. 5.Double 26 =
  6. 6.Magic trick! Think of 10. Double it, add 16, halve it, then take away 10. What number do you get?
  7. 7.In 5 years a boy will be 13 years old. How old was he 2 years ago?
  8. 8.Magic square (every row, column and diagonal has the same total): 13 6 11 | ? 10 12 | 9 14 7. What is the missing number?
  9. 9.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  10. 10.1 + 2 + 3 + … + 25 =
  11. 11.I thought of a number, multiplied it by 3 and added 3. I got 39. What was my number?
  12. 12.2 × 9 =
  13. 13.9 × 6 = ?4 — what is the missing digit?
  14. 14.66 × 10 =
  15. 15.81 × 100 =
  16. 16.12345678 × 8 + 8 =
  17. 17.Magic trick! Think of 9. Double it, add 4, halve it, then take away 9. What number do you get?
  18. 18.178? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 12 (c) 17 (d) 14
  20. 20.1234567 × 9 + 8 =
  21. 21.1 + 3 + 5 + … + 21 =
  22. 22.Double 39 =
  23. 23.What comes next? 16, 19, 22, 25, ? (a) 31 (b) 25 (c) 29 (d) 28
  24. 24.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 22 (c) 18 (d) 12
  25. 25.Double 43 =
  26. 26.56 × 4 =
  27. 27.In 5 years a boy will be 13 years old. How old was he 4 years ago?
  28. 28.If today is Saturday, what day was it 45 days ago? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
  29. 29.Magic trick! Think of 6. Double it, add 4, halve it, then take away 6. What number do you get?
  30. 30.54 × 4 =
  31. 31.613 × 10 =
  32. 32.396 + 693 =
  33. 33.In 6 years a boy will be 14 years old. How old was he 2 years ago?
  34. 34.9 × 5 = ?5 — what is the missing digit?
  35. 35.693 + 396 =
  36. 36.Odd one out: which number is NOT in the 7 times table? (a) 56 (b) 14 (c) 38 (d) 35
  37. 37.?46 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  38. 38.5 × 9 =
  39. 39.12345 × 9 + 6 =
  40. 40.9 × 4 = 3? — what is the missing digit?

Answer key

  1. 1000
  2. 7
  3. Tuesday
  4. 5
  5. 52
  6. 8
  7. 6
  8. 8
  9. 3
  10. 325
  11. 12
  12. 18
  13. 5
  14. 660
  15. 8100
  16. 98765432
  17. 2
  18. 2
  19. 16
  20. 11111111
  21. 121
  22. 78
  23. 28
  24. 22
  25. 86
  26. 224
  27. 4
  28. Wednesday
  29. 2
  30. 216
  31. 6130
  32. 1089
  33. 6
  34. 4
  35. 1089
  36. 38
  37. 8
  38. 45
  39. 111111
  40. 6

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