Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 565 · 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.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 12 (c) 16 (d) 17
2. 2.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 48 (c) 49 (d) 42
3. 3.12345679 × 63 =
4. 4.The 8th of a month is a Monday. What day is the 18th of the same month? (a) Thursday (b) Sunday (c) Friday (d) Wednesday
5. 5.12345679 × 54 =
6. 6.?620 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
7. 7.What comes next? 11, 19, 27, 35, ? (a) 51 (b) 44 (c) 43 (d) 35
8. 8.37 × 18 =
9. 9.Take 74 and take away the sum of its digits. What do you get?
10. 10.Magic trick! Think of 16. Double it, add 12, halve it, then take away 16. What number do you get?
11. 11.Double 21 =
12. 12.Double 54 =
13. 13.Magic trick! Think of 10. Double it, add 6, halve it, then take away 10. What number do you get?
14. 14.Think of 14. Multiply it by 4, then add 1. What number do you end with?
15. 15.3 × 9 =
16. 16.What comes next? 13, 15, 17, 19, ? (a) 21 (b) 22 (c) 19 (d) 23
17. 17.I thought of a number, added 4 and then doubled it. I got 44. What was my number?
18. 18.47 × 4 =
19. 19.Odd one out: which number is NOT in the 8 times table? (a) 48 (b) 16 (c) 32 (d) 50
20. 20.10 × 9 =
21. 21.Magic square (every row, column and diagonal has the same total): 20 10 12 | 6 ? 22 | 16 18 8. What is the missing number?
22. 22.Half of 122 =
23. 23.17 × 100 =
24. 24.Magic square (every row, column and diagonal has the same total): 7 8 3 | ? 6 10 | 9 4 5. What is the missing number?
25. 25.916 × 10 =
26. 26.Half of 136 =
27. 27.111111 × 111111 =
28. 28.Take 19 and take away the sum of its digits. What do you get?
29. 29.Half of 142 =
30. 30.Magic trick! Think of 11. Double it, add 14, halve it, then take away 11. What number do you get?
31. 31.77 × ? = 7700
32. 32.The ages of two twins add up to 24. How old is each twin?
33. 33.Double 91 =
34. 34.?050 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
35. 35.Take 22 and take away the sum of its digits. What do you get?
36. 36.9 × 7 = ?3 — what is the missing digit?
37. 37.Magic square (every row, column and diagonal has the same total): 8 ? 4 | 3 7 11 | 10 5 6. What is the missing number?
38. 38.57 × 4 =
39. 39.9 × 9 =
40. 40.10 × 4 =

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