Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 591 · 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. 1.1 + 2 + 3 + … + 60 =
2. 2.3 × 9 =
3. 3.Odd one out: which number is NOT in the 8 times table? (a) 56 (b) 32 (c) 64 (d) 25
4. 4.A girl is 7 years old and her brother is 3 years older. How old will her brother be in 6 years?
5. 5.37? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
6. 6.Odd one out: which number is NOT in the 3 times table? (a) 12 (b) 6 (c) 16 (d) 9
7. 7.12 × 4 =
8. 8.What comes next? 5, 8, 11, 14, ? (a) 14 (b) 20 (c) 17 (d) 18
9. 9.Take 79 and take away the sum of its digits. What do you get?
10. 10.Take 98 and take away the sum of its digits. What do you get?
11. 11.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.Magic square (every row, column and diagonal has the same total): 11 10 15 | 16 12 8 | 9 ? 13. What is the missing number?
14. 14.Magic square (every row, column and diagonal has the same total): 8 18 ? | 22 14 6 | 12 10 20. What is the missing number?
15. 15.40 × 4 =
16. 16.?794 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.9 × 2 = ?8 — what is the missing digit?
18. 18.6 × 4 =
19. 19.Magic trick! Think of 13. Double it, add 16, halve it, then take away 13. What number do you get?
20. 20.I thought of a number, multiplied it by 5 and added 4. I got 39. What was my number?
21. 21.1 + 2 + 3 + … + 87 =
22. 22.9 × 6 = 5? — what is the missing digit?
23. 23.897 × 10 =
24. 24.16 × 4 =
25. 25.9 × 6 =
26. 26.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 37 (c) 34 (d) 38
27. 27.8 × 100 =
28. 28.9 × 4 =
29. 29.Double 13 =
30. 30.1 + 2 + 3 + … + 33 =
31. 31.519 × 10 =
32. 32.9 × 5 = ?5 — what is the missing digit?
33. 33.Magic square (every row, column and diagonal has the same total): 14 4 18 | 16 ? 8 | 6 20 10. What is the missing number?
34. 34.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.1 + 3 + 5 + … + 27 =
36. 36.111111 × 111111 =
37. 37.38 × 4 =
38. 38.1 + 3 + 5 + … + 39 =
39. 39.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.The 5th of a month is a Monday. What day is the 14th of the same month? (a) Tuesday (b) Saturday (c) Wednesday (d) Thursday

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