Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 335 · 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. 1.9 × 2 = ?8 — what is the missing digit?
2. 2.111 × 111 =
3. 3.Double 91 =
4. 4.Double 67 =
5. 5.11 × 11 =
6. 6.Half of 142 =
7. 7.9 × 3 =
8. 8.What comes next? 36, 49, 64, 81, ? (a) 100 (b) 102 (c) 101 (d) 98
9. 9.Take 77 and take away the sum of its digits. What do you get?
10. 10.Half of 106 =
11. 11.Double 34 =
12. 12.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.50 × ? = 500
15. 15.37 × 100 =
16. 16.123 × 9 + 4 =
17. 17.1 + 2 + 3 + … + 73 =
18. 18.409? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
19. 19.What comes next? 18, 25, 32, 39, ? (a) 46 (b) 39 (c) 47 (d) 53
20. 20.396 + 693 =
21. 21.If today is Monday, what day will it be after 40 days? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
22. 22.59 × 4 =
23. 23.9 × 9 =
24. 24.1 + 2 + 3 + … + 17 =
25. 25.What comes next? 19, 25, 31, 37, ? (a) 37 (b) 44 (c) 43 (d) 49
26. 26.What comes next? 12, 15, 18, 21, ? (a) 24 (b) 21 (c) 25 (d) 27
27. 27.Double 64 =
28. 28.9 × 4 = ?6 — what is the missing digit?
29. 29.9 × 9 = 8? — what is the missing digit?
30. 30.9 × 1 =
31. 31.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.9 × 2 = 1? — what is the missing digit?
33. 33.Magic square (every row, column and diagonal has the same total): 17 3 13 | 7 ? 15 | 9 19 5. What is the missing number?
34. 34.1 × 9 =
35. 35.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Think of 14. Multiply it by 5, then add 3. What number do you end with?
37. 37.Half of 52 =
38. 38.Double 18 =
39. 39.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹19. How many ₹2 coins do you have?
40. 40.If today is Monday, what day was it 44 days ago? (a) Friday (b) Saturday (c) Tuesday (d) Sunday

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