Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 133 · 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.If today is Sunday, what day was it 54 days ago? (a) Friday (b) Tuesday (c) Monday (d) Wednesday
2. 2.I thought of a number, multiplied it by 2 and added 2. I got 12. What was my number?
3. 3.2 × 9 =
4. 4.9 × 6 = 5? — what is the missing digit?
5. 5.12345679 × 9 =
6. 6.The 2nd of a month is a Tuesday. What day is the 12th of the same month? (a) Monday (b) Saturday (c) Friday (d) Thursday
7. 7.9 × 1 =
8. 8.Double 66 =
9. 9.123456 × 8 + 6 =
10. 10.84 × 100 =
11. 11.42 × ? = 42000
12. 12.11 × 11 =
13. 13.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 16 (c) 14 (d) 17
14. 14.10 × 9 =
15. 15.9 × 6 = ?4 — what is the missing digit?
16. 16.1 + 2 + 3 + … + 15 =
17. 17.41 × 1000 =
18. 18.Half of 38 =
19. 19.Take 58 and take away the sum of its digits. What do you get?
20. 20.Magic trick! Think of 13. Double it, add 6, halve it, then take away 13. What number do you get?
21. 21.Magic square (every row, column and diagonal has the same total): ? 10 5 | 4 8 12 | 11 6 7. What is the missing number?
22. 22.1 + 2 + 3 + … + 37 =
23. 23.24 × 4 =
24. 24.48 × 1000 =
25. 25.The 6th of a month is a Monday. What day is the 24th of the same month? (a) Saturday (b) Monday (c) Friday (d) Thursday
26. 26.875 × ? = 8750
27. 27.What comes next? 12, 15, 18, 21, ? (a) 24 (b) 21 (c) 27 (d) 25
28. 28.352 × 10 =
29. 29.Magic square (every row, column and diagonal has the same total): 10 20 18 | 24 16 8 | ? 12 22. What is the missing number?
30. 30.Magic trick! Think of 6. Double it, add 12, halve it, then take away 6. What number do you get?
31. 31.I thought of a number, added 7 and then doubled it. I got 48. What was my number?
32. 32.13 × 4 =
33. 33.49 × ? = 49000
34. 34.1234567 × 9 + 8 =
35. 35.Magic square (every row, column and diagonal has the same total): 21 18 33 | 36 24 12 | ? 30 27. What is the missing number?
36. 36.56?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
37. 37.Magic square (every row, column and diagonal has the same total): 5 10 3 | ? 6 8 | 9 2 7. What is the missing number?
38. 38.7 × 9 =
39. 39.16 × 4 =
40. 40.Magic trick! Think of 9. Double it, add 8, halve it, then take away 9. What number do you get?

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