Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 179 · 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): 14 29 26 | 35 23 11 | ? 17 32. What is the missing number?
2. 2.1 + 3 + 5 + … + 41 =
3. 3.Magic square (every row, column and diagonal has the same total): 12 22 8 | 10 ? 18 | 20 6 16. What is the missing number?
4. 4.1 × 9 =
5. 5.1 + 2 + 3 + … + 14 =
6. 6.67?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
7. 7.Think of 6. Multiply it by 2, then add 9. What number do you end with?
8. 8.70 × 100 =
9. 9.15 × 4 =
10. 10.If today is Friday, what day was it 34 days ago? (a) Sunday (b) Tuesday (c) Saturday (d) Friday
11. 11.Magic square (every row, column and diagonal has the same total): 25 15 17 | 11 19 ? | 21 23 13. What is the missing number?
12. 12.1 + 2 + 3 + … + 19 =
13. 13.If today is Tuesday, what day will it be after 50 days? (a) Thursday (b) Wednesday (c) Saturday (d) Tuesday
14. 14.Double 23 =
15. 15.Half of 126 =
16. 16.12345679 × 27 =
17. 17.Magic square (every row, column and diagonal has the same total): 5 19 9 | 15 11 ? | 13 3 17. What is the missing number?
18. 18.If today is Tuesday, what day was it 51 days ago? (a) Saturday (b) Wednesday (c) Monday (d) Sunday
19. 19.111 × 111 =
20. 20.16 × 4 =
21. 21.18 × 4 =
22. 22.9 × 6 =
23. 23.1 + 2 + 3 + … + 54 =
24. 24.A girl is 6 years old and her brother is 3 years older. How old will her brother be in 6 years?
25. 25.1 + 2 + 3 + … + 7 =
26. 26.1 + 2 + 3 + … + 8 =
27. 27.If today is Sunday, what day was it 9 days ago? (a) Saturday (b) Friday (c) Thursday (d) Monday
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
29. 29.4 × 9 =
30. 30.48 × 4 =
31. 31.9 × 8 = ?2 — what is the missing digit?
32. 32.9 × 10 =
33. 33.I thought of a number, multiplied it by 3 and added 5. I got 44. What was my number?
34. 34.1 + 2 + 3 + … + 91 =
35. 35.The 8th of a month is a Wednesday. What day is the 30th of the same month? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
36. 36.9 × 2 =
37. 37.52 × 4 =
38. 38.7 × 9 =
39. 39.Magic square (every row, column and diagonal has the same total): 24 27 12 | 9 21 33 | ? 15 18. What is the missing number?
40. 40.Think of 13. Multiply it by 2, then add 5. What number do you end with?

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