Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 624 · 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. 1.792 + 297 =
2. 2.The 7th of a month is a Friday. What day is the 27th of the same month? (a) Wednesday (b) Friday (c) Sunday (d) Thursday
3. 3.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Think of 2. Multiply it by 3, then add 5. What number do you end with?
5. 5.9 × 10 = 9? — what is the missing digit?
6. 6.31 × 4 =
7. 7.98 × 100 =
8. 8.Magic square (every row, column and diagonal has the same total): 17 7 21 | 19 15 11 | ? 23 13. What is the missing number?
9. 9.2 × 9 =
10. 10.Odd one out: which number is NOT in the 9 times table? (a) 63 (b) 45 (c) 35 (d) 18
11. 11.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 9 years?
12. 12.A piggy bank has 2 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
13. 13.Magic square (every row, column and diagonal has the same total): ? 16 11 | 14 12 10 | 13 8 15. What is the missing number?
14. 14.Magic trick! Think of 8. Double it, add 18, halve it, then take away 8. What number do you get?
15. 15.Half of 142 =
16. 16.Half of 118 =
17. 17.9 × 9 =
18. 18.What comes next? 5, 9, 13, 17, ? (a) 22 (b) 17 (c) 21 (d) 25
19. 19.9 × 3 = ?7 — what is the missing digit?
20. 20.21 × 1000 =
21. 21.934 × 10 =
22. 22.Odd one out: which number is NOT in the 7 times table? (a) 32 (b) 28 (c) 49 (d) 42
23. 23.I thought of a number, added 9 and then doubled it. I got 56. What was my number?
24. 24.9 × 4 = ?6 — what is the missing digit?
25. 25.1 + 2 + 3 + … + 49 =
26. 26.10 × 9 =
27. 27.1 + 2 + 3 + … + 79 =
28. 28.13 × 4 =
29. 29.Do the 1089 trick with 571: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.The 1st of a month is a Thursday. What day is the 10th of the same month? (a) Friday (b) Tuesday (c) Sunday (d) Saturday
31. 31.1 × 9 =
32. 32.What comes next? 19, 22, 25, 28, ? (a) 28 (b) 32 (c) 34 (d) 31
33. 33.1 + 2 + 3 + … + 86 =
34. 34.34 × 4 =
35. 35.396 + 693 =
36. 36.Magic square (every row, column and diagonal has the same total): 9 14 7 | 8 ? 12 | 13 6 11. What is the missing number?
37. 37.37 × 15 =
38. 38.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 12 (c) 14 (d) 16
39. 39.8 × 9 =
40. 40.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 24 (c) 32 (d) 28

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