Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 268 · 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 trick! Think of 6. Double it, add 18, halve it, then take away 6. What number do you get?
2. 2.What comes next? 8, 12, 16, 20, ? (a) 24 (b) 28 (c) 20 (d) 25
3. 3.If today is Monday, what day will it be after 43 days? (a) Monday (b) Friday (c) Tuesday (d) Wednesday
4. 4.Half of 52 =
5. 5.Magic trick! Think of 19. Double it, add 12, halve it, then take away 19. What number do you get?
6. 6.759 × ? = 7590
7. 7.66?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.Double 42 =
9. 9.Think of 12. Multiply it by 3, then add 5. What number do you end with?
10. 10.287? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.9 × 7 = 6? — what is the missing digit?
12. 12.The ages of two twins add up to 28. How old is each twin?
13. 13.792 + 297 =
14. 14.Half of 152 =
15. 15.9 × 10 = 9? — what is the missing digit?
16. 16.46 × 4 =
17. 17.37 × 12 =
18. 18.7 × 9 =
19. 19.Magic trick! Think of 12. Double it, add 12, halve it, then take away 12. What number do you get?
20. 20.1 × 9 =
21. 21.28 × 4 =
22. 22.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 26 (c) 23 (d) 25
23. 23.1 + 2 + 3 + … + 51 =
24. 24.396 + 693 =
25. 25.43 × 4 =
26. 26.9 × 10 = ?0 — what is the missing digit?
27. 27.2 × 9 =
28. 28.9 × 10 =
29. 29.What comes next? 9, 16, 25, 36, ? (a) 49 (b) 51 (c) 50 (d) 47
30. 30.6 × 1000 =
31. 31.If today is Monday, what day will it be after 56 days? (a) Thursday (b) Tuesday (c) Sunday (d) Monday
32. 32.Magic square (every row, column and diagonal has the same total): 11 12 7 | 6 10 14 | 13 8 ?. What is the missing number?
33. 33.9 × 4 =
34. 34.I thought of a number, added 1 and then doubled it. I got 36. What was my number?
35. 35.Half of 36 =
36. 36.70?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
37. 37.Take 49 and take away the sum of its digits. What do you get?
38. 38.807 × 10 =
39. 39.What comes next? 14, 18, 22, 26, ? (a) 34 (b) 26 (c) 30 (d) 31
40. 40.Half of 58 =

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