Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 814 · 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. 1.59 × 4 =
2. 2.19 × 4 =
3. 3.9 × 9 =
4. 4.What comes next? 3, 5, 7, 9, ? (a) 13 (b) 9 (c) 12 (d) 11
5. 5.Magic trick! Think of 20. Double it, add 8, halve it, then take away 20. What number do you get?
6. 6.Half of 112 =
7. 7.Magic trick! Think of 15. Double it, add 12, halve it, then take away 15. What number do you get?
8. 8.44 × ? = 440
9. 9.Half of 148 =
10. 10.Odd one out: which number is NOT in the 5 times table? (a) 28 (b) 25 (c) 30 (d) 10
11. 11.9 × 2 = ?8 — what is the missing digit?
12. 12.3 × 9 =
13. 13.687 × 10 =
14. 14.Magic square (every row, column and diagonal has the same total): 16 2 ? | 6 10 14 | 8 18 4. What is the missing number?
15. 15.1 + 2 + 3 + … + 88 =
16. 16.11 × 11 =
17. 17.A girl is 8 years old and her brother is 4 years older. How old will her brother be in 2 years?
18. 18.If today is Friday, what day will it be after 44 days? (a) Wednesday (b) Saturday (c) Monday (d) Sunday
19. 19.Magic square (every row, column and diagonal has the same total): 16 6 ? | 2 10 18 | 12 14 4. What is the missing number?
20. 20.13 × 1000 =
21. 21.The 3rd of a month is a Saturday. What day is the 30th of the same month? (a) Monday (b) Thursday (c) Saturday (d) Friday
22. 22.Half of 28 =
23. 23.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 47 (c) 49 (d) 50
24. 24.10 × ? = 10000
25. 25.123 × 9 + 4 =
26. 26.12345679 × 18 =
27. 27.A father is 36 years old and his son is 13. How old was the father when the son was born?
28. 28.12345679 × 27 =
29. 29.The ages of two twins add up to 26. How old is each twin?
30. 30.9 × 8 =
31. 31.What comes next? 9, 18, 27, 36, ? (a) 54 (b) 36 (c) 46 (d) 45
32. 32.Magic square (every row, column and diagonal has the same total): 28 7 22 | 13 19 ? | 16 31 10. What is the missing number?
33. 33.The ages of two twins add up to 14. How old is each twin?
34. 34.Magic square (every row, column and diagonal has the same total): 20 22 12 | ? 18 26 | 24 14 16. What is the missing number?
35. 35.10 × 9 =
36. 36.12345679 × 72 =
37. 37.1 × 9 =
38. 38.What comes next? 2, 8, 14, 20, ? (a) 32 (b) 26 (c) 20 (d) 27
39. 39.What comes next? 13, 19, 25, 31, ? (a) 43 (b) 38 (c) 37 (d) 31
40. 40.12 × 8 + 2 =

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