Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 343 · 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.Magic square (every row, column and diagonal has the same total): 9 ? 17 | 19 11 3 | 5 15 13. What is the missing number?
2. 2.1234 × 9 + 5 =
3. 3.9 × 3 = ?7 — what is the missing digit?
4. 4.Think of 12. Multiply it by 4, then add 2. What number do you end with?
5. 5.The 7th of a month is a Thursday. What day is the 18th of the same month? (a) Monday (b) Tuesday (c) Sunday (d) Thursday
6. 6.Half of 132 =
7. 7.1234567 × 8 + 7 =
8. 8.10 × 4 =
9. 9.37 × 27 =
10. 10.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹22. How many ₹2 coins do you have?
11. 11.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 28 (c) 32 (d) 24
12. 12.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Odd one out: which number is NOT in the 9 times table? (a) 27 (b) 36 (c) 45 (d) 29
14. 14.9 × 5 = ?5 — what is the missing digit?
15. 15.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.1 + 2 + 3 + … + 19 =
17. 17.Think of 7. Multiply it by 3, then add 5. What number do you end with?
18. 18.12345679 × 9 =
19. 19.81?1 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.Magic square (every row, column and diagonal has the same total): 13 ? 21 | 23 15 7 | 9 19 17. What is the missing number?
21. 21.32?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
22. 22.6 × 9 =
23. 23.3 × 9 =
24. 24.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Magic trick! Think of 6. Double it, add 14, halve it, then take away 6. What number do you get?
26. 26.6?26 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.742 × 10 =
28. 28.A girl is 8 years old and her brother is 6 years older. How old will her brother be in 8 years?
29. 29.9 × 4 =
30. 30.69 × 100 =
31. 31.Take 61 and take away the sum of its digits. What do you get?
32. 32.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 34 (c) 38 (d) 37
33. 33.23 × 100 =
34. 34.1 + 2 + 3 + … + 62 =
35. 35.Think of 2. Multiply it by 5, then add 1. What number do you end with?
36. 36.31 × 4 =
37. 37.1 + 2 + 3 + … + 7 =
38. 38.9 × 10 =
39. 39.Odd one out: which number is NOT in the 5 times table? (a) 20 (b) 15 (c) 10 (d) 49
40. 40.50 × 1000 =

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