Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 116 · 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.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Odd one out: which number is NOT in the 9 times table? (a) 36 (b) 38 (c) 54 (d) 18
3. 3.Half of 52 =
4. 4.If today is Sunday, what day will it be after 69 days? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
5. 5.9 × 8 =
6. 6.9 × 3 = 2? — what is the missing digit?
7. 7.785 × ? = 7850
8. 8.What comes next? 36, 49, 64, 81, ? (a) 98 (b) 102 (c) 101 (d) 100
9. 9.1 × 9 =
10. 10.A father is 36 years old and his son is 14. How old was the father when the son was born?
11. 11.Double 45 =
12. 12.The 4th of a month is a Friday. What day is the 27th of the same month? (a) Monday (b) Wednesday (c) Sunday (d) Saturday
13. 13.Magic square (every row, column and diagonal has the same total): 7 12 11 | 14 10 6 | ? 8 13. What is the missing number?
14. 14.49 × 4 =
15. 15.If today is Tuesday, what day will it be after 15 days? (a) Saturday (b) Wednesday (c) Thursday (d) Tuesday
16. 16.9 × 6 =
17. 17.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.What comes next? 2, 6, 10, 14, ? (a) 22 (b) 18 (c) 14 (d) 19
19. 19.Take 18 and take away the sum of its digits. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.3 × 9 =
22. 22.24 × 4 =
23. 23.9 × 4 =
24. 24.4 × 9 =
25. 25.If today is Tuesday, what day was it 52 days ago? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
26. 26.Half of 58 =
27. 27.9 × 8 = ?2 — what is the missing digit?
28. 28.1 + 3 + 5 + … + 45 =
29. 29.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.1 + 2 + 3 + … + 59 =
31. 31.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 48 (c) 65 (d) 64
32. 32.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 27 (c) 23 (d) 26
33. 33.Magic square (every row, column and diagonal has the same total): 11 6 13 | 12 10 8 | 7 ? 9. What is the missing number?
34. 34.1 + 3 + 5 + … + 39 =
35. 35.9 × 7 = 6? — what is the missing digit?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.2 × 9 =
39. 39.Magic square (every row, column and diagonal has the same total): 17 14 ? | 32 20 8 | 11 26 23. What is the missing number?
40. 40.9 × 5 =

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