Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 955 · 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.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.What comes next? 13, 16, 19, 22, ? (a) 26 (b) 22 (c) 25 (d) 28
3. 3.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Magic trick! Think of 3. Double it, add 16, halve it, then take away 3. What number do you get?
5. 5.A father is 32 years old and his son is 12. How old was the father when the son was born?
6. 6.9 × 7 = ?3 — what is the missing digit?
7. 7.32 × 4 =
8. 8.38 × 4 =
9. 9.What comes next? 16, 25, 36, 49, ? (a) 64 (b) 62 (c) 65 (d) 66
10. 10.9 × 1 =
11. 11.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 26 (c) 23 (d) 27
12. 12.9 × 2 = ?8 — what is the missing digit?
13. 13.29 × ? = 29000
14. 14.64 × 10 =
15. 15.50 × 4 =
16. 16.I thought of a number, multiplied it by 5 and added 8. I got 48. What was my number?
17. 17.2 × 9 =
18. 18.Magic square (every row, column and diagonal has the same total): 5 19 9 | 15 11 7 | 13 3 ?. What is the missing number?
19. 19.8 × 9 =
20. 20.The 5th of a month is a Sunday. What day is the 17th of the same month? (a) Thursday (b) Saturday (c) Friday (d) Monday
21. 21.1234 × 8 + 4 =
22. 22.37 × 27 =
23. 23.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 16 (d) 12
24. 24.1 + 3 + 5 + … + 35 =
25. 25.12345679 × 81 =
26. 26.Double 52 =
27. 27.66 × 10 =
28. 28.Magic square (every row, column and diagonal has the same total): 8 23 20 | 29 17 5 | 14 ? 26. What is the missing number?
29. 29.49 × ? = 490
30. 30.Magic square (every row, column and diagonal has the same total): 10 25 ? | 31 19 7 | 16 13 28. What is the missing number?
31. 31.Double 17 =
32. 32.Half of 162 =
33. 33.54 × 4 =
34. 34.Magic trick! Think of 11. Double it, add 16, halve it, then take away 11. What number do you get?
35. 35.If today is Friday, what day will it be after 51 days? (a) Saturday (b) Monday (c) Wednesday (d) Sunday
36. 36.What comes next? 12, 16, 20, 24, ? (a) 24 (b) 28 (c) 29 (d) 32
37. 37.Think of 8. Multiply it by 5, then add 9. What number do you end with?
38. 38.5 × 9 =
39. 39.1 + 3 + 5 + … + 49 =
40. 40.Magic square (every row, column and diagonal has the same total): 16 2 12 | 6 10 14 | 8 18 ?. What is the missing number?

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