Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 633 · 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. 1.9 × 7 =
2. 2.30 × 4 =
3. 3.297 + 792 =
4. 4.3 × ? = 300
5. 5.If today is Saturday, what day will it be after 91 days? (a) Tuesday (b) Saturday (c) Friday (d) Sunday
6. 6.15 × 4 =
7. 7.39 × 4 =
8. 8.891 + 198 =
9. 9.Double 31 =
10. 10.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 16 (c) 17 (d) 14
11. 11.1 + 2 + 3 + … + 24 =
12. 12.Magic square (every row, column and diagonal has the same total): 8 ? 12 | 13 9 5 | 6 11 10. What is the missing number?
13. 13.396 + 693 =
14. 14.20 × 4 =
15. 15.24 × 4 =
16. 16.?82 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.Double 85 =
18. 18.48 × 1000 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.9 × 10 =
21. 21.The 2nd of a month is a Saturday. What day is the 29th of the same month? (a) Monday (b) Saturday (c) Friday (d) Thursday
22. 22.Take 15 and take away the sum of its digits. What do you get?
23. 23.Magic square (every row, column and diagonal has the same total): 13 8 ? | 6 10 14 | 11 12 7. What is the missing number?
24. 24.A girl is 5 years old and her brother is 2 years older. How old will her brother be in 2 years?
25. 25.Magic square (every row, column and diagonal has the same total): 5 15 ? | 19 11 3 | 9 7 17. What is the missing number?
26. 26.Odd one out: which number is NOT in the 4 times table? (a) 14 (b) 20 (c) 32 (d) 8
27. 27.A girl is 5 years old and her brother is 3 years older. How old will her brother be in 8 years?
28. 28.Odd one out: which number is NOT in the 9 times table? (a) 45 (b) 46 (c) 36 (d) 54
29. 29.604? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
30. 30.Magic square (every row, column and diagonal has the same total): 10 20 ? | 24 16 8 | 14 12 22. What is the missing number?
31. 31.9 × 1000 =
32. 32.If today is Wednesday, what day was it 14 days ago? (a) Tuesday (b) Wednesday (c) Thursday (d) Saturday
33. 33.9 × 2 = ?8 — what is the missing digit?
34. 34.40 × 4 =
35. 35.Double 72 =
36. 36.1 + 2 + 3 + … + 17 =
37. 37.If today is Saturday, what day will it be after 16 days? (a) Monday (b) Thursday (c) Tuesday (d) Sunday
38. 38.1 + 2 + 3 + … + 9 =
39. 39.81 × 100 =
40. 40.Odd one out: which number is NOT in the 6 times table? (a) 18 (b) 22 (c) 24 (d) 36

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