Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 188 · 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.What comes next? 4, 11, 18, 25, ? (a) 25 (b) 32 (c) 39 (d) 33
2. 2.9 × 4 = 3? — what is the missing digit?
3. 3.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 49 (d) 42
4. 4.Magic square (every row, column and diagonal has the same total): 10 15 ? | 9 11 13 | 14 7 12. What is the missing number?
5. 5.1 + 3 + 5 + … + 39 =
6. 6.51 × 4 =
7. 7.29 × 4 =
8. 8.In 5 years a boy will be 15 years old. How old was he 2 years ago?
9. 9.Magic square (every row, column and diagonal has the same total): 26 11 32 | 29 23 17 | 14 35 ?. What is the missing number?
10. 10.39 × 4 =
11. 11.Magic square (every row, column and diagonal has the same total): ? 11 14 | 5 17 29 | 20 23 8. What is the missing number?
12. 12.9 × 1 =
13. 13.139 × 10 =
14. 14.What comes next? 16, 25, 36, 49, ? (a) 66 (b) 65 (c) 62 (d) 64
15. 15.37 × 9 =
16. 16.1 + 2 + 3 + … + 88 =
17. 17.9 × 6 = ?4 — what is the missing digit?
18. 18.20 × 4 =
19. 19.Magic square (every row, column and diagonal has the same total): 10 8 ? | 20 12 4 | 6 16 14. What is the missing number?
20. 20.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.The 2nd of a month is a Monday. What day is the 21st of the same month? (a) Friday (b) Tuesday (c) Sunday (d) Saturday
23. 23.123456 × 8 + 6 =
24. 24.9 × 4 = ?6 — what is the missing digit?
25. 25.Magic square (every row, column and diagonal has the same total): 10 9 14 | 15 11 7 | 8 13 ?. What is the missing number?
26. 26.9 × 9 =
27. 27.Do the 1089 trick with 468: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.12 × 100 =
29. 29.Magic trick! Think of 2. Double it, add 8, halve it, then take away 2. What number do you get?
30. 30.Take 487. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.237? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.9 × 8 = 7? — what is the missing digit?
33. 33.8 × 4 =
34. 34.The 1st of a month is a Monday. What day is the 23rd of the same month? (a) Friday (b) Tuesday (c) Monday (d) Wednesday
35. 35.I thought of a number, multiplied it by 2 and added 4. I got 32. What was my number?
36. 36.I thought of a number, multiplied it by 4 and added 3. I got 51. What was my number?
37. 37.The 5th of a month is a Thursday. What day is the 23rd of the same month? (a) Thursday (b) Tuesday (c) Sunday (d) Monday
38. 38.Take 541. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Magic square (every row, column and diagonal has the same total): 26 5 20 | 11 17 23 | ? 29 8. What is the missing number?
40. 40.Odd one out: which number is NOT in the 6 times table? (a) 12 (b) 19 (c) 24 (d) 18

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