Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 951 · 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.Odd one out: which number is NOT in the 6 times table? (a) 18 (b) 56 (c) 30 (d) 42
2. 2.Magic trick! Think of 12. Double it, add 8, halve it, then take away 12. What number do you get?
3. 3.Odd one out: which number is NOT in the 8 times table? (a) 24 (b) 40 (c) 16 (d) 25
4. 4.Magic square (every row, column and diagonal has the same total): 20 22 12 | ? 18 26 | 24 14 16. What is the missing number?
5. 5.589 × 10 =
6. 6.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 27 (c) 25 (d) 26
7. 7.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Magic square (every row, column and diagonal has the same total): ? 8 13 | 10 12 14 | 11 16 9. What is the missing number?
9. 9.Do the 1089 trick with 254: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.4 × 9 =
12. 12.Magic trick! Think of 18. Double it, add 18, halve it, then take away 18. What number do you get?
13. 13.6 × 4 =
14. 14.Half of 148 =
15. 15.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.4 × ? = 4000
17. 17.Take 35 and take away the sum of its digits. What do you get?
18. 18.1 × 9 =
19. 19.9 × 7 =
20. 20.The 8th of a month is a Monday. What day is the 26th of the same month? (a) Saturday (b) Thursday (c) Friday (d) Monday
21. 21.16 × 4 =
22. 22.Magic square (every row, column and diagonal has the same total): 12 22 8 | 10 14 18 | 20 ? 16. What is the missing number?
23. 23.Double 71 =
24. 24.In 5 years a boy will be 19 years old. How old was he 2 years ago?
25. 25.9 × 7 = 6? — what is the missing digit?
26. 26.Half of 166 =
27. 27.1 + 2 + 3 + … + 76 =
28. 28.1 + 2 + 3 + … + 19 =
29. 29.1 + 3 + 5 + … + 23 =
30. 30.Magic square (every row, column and diagonal has the same total): 6 20 10 | 16 12 ? | 14 4 18. What is the missing number?
31. 31.The 8th of a month is a Monday. What day is the 19th of the same month? (a) Monday (b) Thursday (c) Friday (d) Saturday
32. 32.Double 62 =
33. 33.1234567 × 9 + 8 =
34. 34.12345679 × 81 =
35. 35.37 × 9 =
36. 36.Half of 42 =
37. 37.24?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.What comes next? 2, 4, 8, 16, ? (a) 24 (b) 33 (c) 32 (d) 28
39. 39.12345679 × 9 =
40. 40.What comes next? 5, 13, 21, 29, ? (a) 37 (b) 29 (c) 45 (d) 38

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