Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 568 · 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. 1.19 × 1000 =
2. 2.1 + 2 + 3 + … + 82 =
3. 3.Half of 28 =
4. 4.9 × 10 = 9? — what is the missing digit?
5. 5.1 + 3 + 5 + … + 37 =
6. 6.1 × 9 =
7. 7.?580 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.?766 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
9. 9.Magic square (every row, column and diagonal has the same total): ? 22 20 | 26 18 10 | 16 14 24. What is the missing number?
10. 10.Take 31 and take away the sum of its digits. What do you get?
11. 11.37 × 1000 =
12. 12.9 × 10 = ?0 — what is the missing digit?
13. 13.35 × 4 =
14. 14.1 + 2 + 3 + … + 63 =
15. 15.9 × 8 = ?2 — what is the missing digit?
16. 16.20 × 4 =
17. 17.9 × 8 = 7? — what is the missing digit?
18. 18.Magic square (every row, column and diagonal has the same total): 8 ? 6 | 3 5 7 | 4 9 2. What is the missing number?
19. 19.56 × 4 =
20. 20.12 × 4 =
21. 21.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
22. 22.736 × 10 =
23. 23.Double 66 =
24. 24.281 × ? = 2810
25. 25.Double 93 =
26. 26.What comes next? 7, 11, 15, 19, ? (a) 19 (b) 23 (c) 27 (d) 24
27. 27.Magic square (every row, column and diagonal has the same total): 15 8 13 | ? 12 14 | 11 16 9. What is the missing number?
28. 28.What comes next? 25, 36, 49, 64, ? (a) 81 (b) 79 (c) 82 (d) 83
29. 29.5?94 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
30. 30.If today is Tuesday, what day was it 14 days ago? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
31. 31.Magic square (every row, column and diagonal has the same total): 3 10 5 | 8 6 4 | 7 ? 9. What is the missing number?
32. 32.If today is Tuesday, what day will it be after 96 days? (a) Saturday (b) Wednesday (c) Monday (d) Sunday
33. 33.111 × 111 =
34. 34.Magic trick! Think of 14. Double it, add 14, halve it, then take away 14. What number do you get?
35. 35.3 × 9 =
36. 36.Magic square (every row, column and diagonal has the same total): 15 16 11 | ? 14 18 | 17 12 13. What is the missing number?
37. 37.9 × 9 = ?1 — what is the missing digit?
38. 38.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 81 (c) 60 (d) 80
40. 40.Magic square (every row, column and diagonal has the same total): 9 ? 17 | 19 11 3 | 5 15 13. What is the missing number?

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