Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 80 · 40 questions

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.

1. 1.29 × ? = 29000
2. 2.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.I thought of a number, added 8 and then doubled it. I got 46. What was my number?
4. 4.1234567 × 9 + 8 =
5. 5.9 × 4 =
6. 6.Magic square (every row, column and diagonal has the same total): 4 9 ? | 11 7 3 | 6 5 10. What is the missing number?
7. 7.The 3rd of a month is a Sunday. What day is the 28th of the same month? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
8. 8.3 × 9 =
9. 9.9 × 3 = 2? — what is the missing digit?
10. 10.I thought of a number, added 6 and then doubled it. I got 34. What was my number?
11. 11.Half of 96 =
12. 12.In 6 years a boy will be 19 years old. How old was he 4 years ago?
13. 13.1 + 3 + 5 + … + 11 =
14. 14.Magic square (every row, column and diagonal has the same total): 13 12 17 | ? 14 10 | 11 16 15. What is the missing number?
15. 15.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 27 (c) 26 (d) 25
16. 16.The 7th of a month is a Tuesday. What day is the 15th of the same month? (a) Wednesday (b) Saturday (c) Tuesday (d) Thursday
17. 17.Double 86 =
18. 18.11 × 11 =
19. 19.7?10 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.2 × 9 =
21. 21.4 × 1000 =
22. 22.495 + 594 =
23. 23.Magic square (every row, column and diagonal has the same total): 2 7 6 | 9 5 1 | ? 3 8. What is the missing number?
24. 24.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 3 years?
25. 25.731 × ? = 7310
26. 26.86 × 100 =
27. 27.38 × 4 =
28. 28.83 × 100 =
29. 29.34 × 1000 =
30. 30.11 × 1000 =
31. 31.Think of 5. Multiply it by 5, then add 4. What number do you end with?
32. 32.Magic square (every row, column and diagonal has the same total): 18 4 14 | 8 12 16 | 10 ? 6. What is the missing number?
33. 33.9 × 5 = ?5 — what is the missing digit?
34. 34.9 × 2 = 1? — what is the missing digit?
35. 35.Magic square (every row, column and diagonal has the same total): 9 ? 5 | 7 11 15 | 17 3 13. What is the missing number?
36. 36.51 × 4 =
37. 37.7 × 4 =
38. 38.Magic square (every row, column and diagonal has the same total): 14 11 26 | ? 17 5 | 8 23 20. What is the missing number?
39. 39.9 × 1 =
40. 40.Half of 16 =

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