Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 119 · 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.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 34 (c) 38 (d) 36
2. 2.If today is Saturday, what day will it be after 23 days? (a) Sunday (b) Thursday (c) Monday (d) Tuesday
3. 3.46 × 4 =
4. 4.Half of 182 =
5. 5.Magic trick! Think of 15. Double it, add 12, halve it, then take away 15. What number do you get?
6. 6.Think of 13. Multiply it by 5, then add 8. What number do you end with?
7. 7.9 × 4 =
8. 8.Double 38 =
9. 9.Think of 15. Multiply it by 4, then add 1. What number do you end with?
10. 10.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.What comes next? 6, 13, 20, 27, ? (a) 35 (b) 27 (c) 34 (d) 41
13. 13.1 + 3 + 5 + … + 49 =
14. 14.1 + 2 + 3 + … + 74 =
15. 15.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 12 (c) 17 (d) 14
16. 16.1234567 × 8 + 7 =
17. 17.If today is Friday, what day will it be after 67 days? (a) Monday (b) Wednesday (c) Friday (d) Tuesday
18. 18.62 × 100 =
19. 19.In 5 years a boy will be 15 years old. How old was he 3 years ago?
20. 20.Odd one out: which number is NOT in the 7 times table? (a) 14 (b) 42 (c) 28 (d) 23
21. 21.Magic square (every row, column and diagonal has the same total): ? 19 5 | 7 11 15 | 17 3 13. What is the missing number?
22. 22.44 × 1000 =
23. 23.A father is 37 years old and his son is 11. How old was the father when the son was born?
24. 24.Odd one out: which number is NOT in the 4 times table? (a) 35 (b) 16 (c) 8 (d) 24
25. 25.Odd one out: which number is NOT in the 4 times table? (a) 15 (b) 36 (c) 16 (d) 24
26. 26.1 + 3 + 5 + … + 27 =
27. 27.Magic square (every row, column and diagonal has the same total): 14 9 16 | 15 13 11 | 10 17 ?. What is the missing number?
28. 28.Think of 2. Multiply it by 2, then add 6. What number do you end with?
29. 29.If today is Monday, what day was it 14 days ago? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
30. 30.9 × 7 = ?3 — what is the missing digit?
31. 31.I thought of a number, added 1 and then doubled it. I got 38. What was my number?
32. 32.9 × 2 = 1? — what is the missing digit?
33. 33.9 × 4 = ?6 — what is the missing digit?
34. 34.Magic trick! Think of 11. Double it, add 16, halve it, then take away 11. What number do you get?
35. 35.1 + 2 + 3 + … + 21 =
36. 36.If today is Wednesday, what day was it 54 days ago? (a) Thursday (b) Friday (c) Saturday (d) Monday
37. 37.1234567 × 9 + 8 =
38. 38.Take 24 and take away the sum of its digits. What do you get?
39. 39.12345 × 8 + 5 =
40. 40.1 × 9 =

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