Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 783 · 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? 18, 20, 22, 24, ? (a) 28 (b) 26 (c) 24 (d) 27
2. 2.Magic square (every row, column and diagonal has the same total): 25 11 21 | 15 19 23 | 17 ? 13. What is the missing number?
3. 3.If today is Saturday, what day will it be after 15 days? (a) Wednesday (b) Monday (c) Saturday (d) Sunday
4. 4.1 + 3 + 5 + … + 25 =
5. 5.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 50 (c) 47 (d) 49
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Magic trick! Think of 18. Double it, add 4, halve it, then take away 18. What number do you get?
8. 8.I thought of a number, multiplied it by 5 and added 5. I got 60. What was my number?
9. 9.1 + 2 + 3 + … + 23 =
10. 10.What comes next? 1, 8, 15, 22, ? (a) 29 (b) 22 (c) 36 (d) 30
11. 11.Magic trick! Think of 9. Double it, add 16, halve it, then take away 9. What number do you get?
12. 12.1111 × 1111 =
13. 13.59 × 4 =
14. 14.Take 43 and take away the sum of its digits. What do you get?
15. 15.What comes next? 16, 19, 22, 25, ? (a) 31 (b) 29 (c) 28 (d) 25
16. 16.Magic square (every row, column and diagonal has the same total): 15 8 13 | 10 12 14 | ? 16 9. What is the missing number?
17. 17.442 × 10 =
18. 18.9 × 2 =
19. 19.9 × 5 = ?5 — what is the missing digit?
20. 20.792 + 297 =
21. 21.The ages of two twins add up to 8. How old is each twin?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.9 × 2 = 1? — what is the missing digit?
24. 24.9 × 4 =
25. 25.9 × 10 =
26. 26.9 × 7 = ?3 — what is the missing digit?
27. 27.Magic trick! Think of 16. Double it, add 16, halve it, then take away 16. What number do you get?
28. 28.12345679 × 63 =
29. 29.I thought of a number, multiplied it by 3 and added 5. I got 50. What was my number?
30. 30.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 23 (c) 25 (d) 27
31. 31.I thought of a number, multiplied it by 2 and added 2. I got 12. What was my number?
32. 32.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 6 (c) 8 (d) 9
33. 33.Magic square (every row, column and diagonal has the same total): 11 12 7 | 6 10 14 | 13 8 ?. What is the missing number?
34. 34.Odd one out: which number is NOT in the 3 times table? (a) 18 (b) 21 (c) 12 (d) 10
35. 35.29 × 4 =
36. 36.Magic trick! Think of 7. Double it, add 12, halve it, then take away 7. What number do you get?
37. 37.1 × 9 =
38. 38.Take 84 and take away the sum of its digits. What do you get?
39. 39.10 × 9 =
40. 40.Take 71 and take away the sum of its digits. What do you get?

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