Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 23 · 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): ? 10 13 | 4 16 28 | 19 22 7. What is the missing number?
2. 2.I thought of a number, multiplied it by 3 and added 8. I got 26. What was my number?
3. 3.Odd one out: which number is NOT in the 9 times table? (a) 36 (b) 18 (c) 65 (d) 63
4. 4.9 × 2 = 1? — what is the missing digit?
5. 5.The ages of two twins add up to 14. How old is each twin?
6. 6.9 × 2 = ?8 — what is the missing digit?
7. 7.9 × 1 =
8. 8.9 × 5 = 4? — what is the missing digit?
9. 9.1 + 3 + 5 + … + 41 =
10. 10.Magic square (every row, column and diagonal has the same total): 14 29 26 | 35 23 ? | 20 17 32. What is the missing number?
11. 11.343 × 10 =
12. 12.Magic square (every row, column and diagonal has the same total): 11 12 7 | 6 10 14 | 13 ? 9. What is the missing number?
13. 13.If today is Sunday, what day was it 32 days ago? (a) Wednesday (b) Thursday (c) Saturday (d) Tuesday
14. 14.What comes next? 8, 15, 22, 29, ? (a) 37 (b) 43 (c) 29 (d) 36
15. 15.6 × 9 =
16. 16.31 × 4 =
17. 17.36 × 4 =
18. 18.111 × 111 =
19. 19.The 7th of a month is a Tuesday. What day is the 25th of the same month? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
20. 20.If today is Friday, what day was it 43 days ago? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
21. 21.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 23 (c) 25 (d) 27
22. 22.1234 × 8 + 4 =
23. 23.Half of 124 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.2 × 100 =
26. 26.Double 97 =
27. 27.599 × 10 =
28. 28.12345679 × 54 =
29. 29.Double 31 =
30. 30.1 + 3 + 5 + … + 31 =
31. 31.I thought of a number, multiplied it by 2 and added 3. I got 17. What was my number?
32. 32.19 × 4 =
33. 33.If today is Monday, what day was it 50 days ago? (a) Monday (b) Wednesday (c) Saturday (d) Sunday
34. 34.1 + 2 + 3 + … + 7 =
35. 35.Think of 5. Multiply it by 4, then add 9. What number do you end with?
36. 36.9 × 4 = 3? — what is the missing digit?
37. 37.3 × 9 =
38. 38.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 36 (c) 34 (d) 37
39. 39.I thought of a number, multiplied it by 3 and added 1. I got 19. What was my number?
40. 40.533 × 10 =

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