Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 84 · 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.Magic square (every row, column and diagonal has the same total): 15 36 21 | 30 24 18 | 27 ? 33. What is the missing number?
2. 2.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.If today is Monday, what day will it be after 13 days? (a) Wednesday (b) Monday (c) Sunday (d) Saturday
4. 4.30 × ? = 30000
5. 5.44?1 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
6. 6.What comes next? 11, 15, 19, 23, ? (a) 23 (b) 28 (c) 27 (d) 31
7. 7.Magic trick! Think of 8. Double it, add 14, halve it, then take away 8. What number do you get?
8. 8.9 × 6 = ?4 — what is the missing digit?
9. 9.35?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
10. 10.Magic trick! Think of 12. Double it, add 18, halve it, then take away 12. What number do you get?
11. 11.Half of 36 =
12. 12.Take 52 and take away the sum of its digits. What do you get?
13. 13.1 + 3 + 5 + … + 43 =
14. 14.I thought of a number, added 3 and then doubled it. I got 14. What was my number?
15. 15.Magic square (every row, column and diagonal has the same total): 20 10 24 | 22 18 ? | 12 26 16. What is the missing number?
16. 16.I thought of a number, multiplied it by 5 and added 3. I got 58. What was my number?
17. 17.12345679 × 63 =
18. 18.1 + 3 + 5 + … + 29 =
19. 19.Half of 58 =
20. 20.Double 61 =
21. 21.A girl is 5 years old and her brother is 6 years older. How old will her brother be in 4 years?
22. 22.54 × 4 =
23. 23.I thought of a number, multiplied it by 3 and added 1. I got 43. What was my number?
24. 24.111111 × 111111 =
25. 25.Half of 52 =
26. 26.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Magic square (every row, column and diagonal has the same total): 12 5 10 | 7 9 11 | ? 13 6. What is the missing number?
28. 28.If today is Friday, what day was it 49 days ago? (a) Monday (b) Thursday (c) Saturday (d) Friday
29. 29.What comes next? 11, 18, 25, 32, ? (a) 39 (b) 46 (c) 32 (d) 40
30. 30.10 × 9 =
31. 31.68 × ? = 680
32. 32.If today is Monday, what day will it be after 39 days? (a) Thursday (b) Friday (c) Saturday (d) Monday
33. 33.If today is Wednesday, what day will it be after 80 days? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
34. 34.Think of 5. Multiply it by 4, then add 9. What number do you end with?
35. 35.Magic square (every row, column and diagonal has the same total): 8 ? 12 | 18 14 10 | 16 6 20. What is the missing number?
36. 36.If today is Sunday, what day was it 22 days ago? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
37. 37.9 × 3 =
38. 38.If today is Saturday, what day will it be after 98 days? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
39. 39.51 × 4 =
40. 40.25 × 1000 =

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