Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 706 · 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. 1.12345679 × 81 =
2. 2.9 × 9 =
3. 3.Double 32 =
4. 4.7 × 9 =
5. 5.Magic square (every row, column and diagonal has the same total): 17 14 29 | 32 20 8 | 11 26 ?. What is the missing number?
6. 6.The 1st of a month is a Monday. What day is the 12th of the same month? (a) Monday (b) Thursday (c) Friday (d) Saturday
7. 7.Magic trick! Think of 6. Double it, add 10, halve it, then take away 6. What number do you get?
8. 8.If today is Tuesday, what day will it be after 92 days? (a) Tuesday (b) Wednesday (c) Thursday (d) Saturday
9. 9.12345679 × 18 =
10. 10.29 × 4 =
11. 11.554 × ? = 5540
12. 12.11 × 11 =
13. 13.792 + 297 =
14. 14.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.9 × 3 =
17. 17.594 + 495 =
18. 18.12345679 × 72 =
19. 19.If today is Thursday, what day was it 58 days ago? (a) Friday (b) Monday (c) Wednesday (d) Tuesday
20. 20.518 × 10 =
21. 21.843 × 10 =
22. 22.3 × 9 =
23. 23.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
24. 24.10 × 4 =
25. 25.12345679 × 54 =
26. 26.314 × 10 =
27. 27.43 × 4 =
28. 28.11 × 4 =
29. 29.9 × 4 =
30. 30.12345 × 9 + 6 =
31. 31.Magic square (every row, column and diagonal has the same total): 14 24 10 | 12 16 20 | 22 8 ?. What is the missing number?
32. 32.9 × 7 = ?3 — what is the missing digit?
33. 33.20 × 4 =
34. 34.1 + 3 + 5 + … + 9 =
35. 35.Magic square (every row, column and diagonal has the same total): 15 25 11 | ? 17 21 | 23 9 19. What is the missing number?
36. 36.40 × 4 =
37. 37.1 + 2 + 3 + … + 60 =
38. 38.57 × 10 =
39. 39.Magic square (every row, column and diagonal has the same total): 16 11 12 | 9 ? 17 | 14 15 10. What is the missing number?
40. 40.9 × 5 = ?5 — what is the missing digit?

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