Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 819 · 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. 1.160 × ? = 1600
2. 2.9 × 5 = 4? — what is the missing digit?
3. 3.2 × 9 =
4. 4.Half of 88 =
5. 5.111111 × 111111 =
6. 6.21 × 4 =
7. 7.What comes next? 12, 17, 22, 27, ? (a) 32 (b) 27 (c) 33 (d) 37
8. 8.Odd one out: which number is NOT in the 7 times table? (a) 17 (b) 21 (c) 56 (d) 35
9. 9.Double 46 =
10. 10.Half of 144 =
11. 11.1 + 2 + 3 + … + 48 =
12. 12.10 × 100 =
13. 13.I thought of a number, multiplied it by 2 and added 9. I got 13. What was my number?
14. 14.Magic square (every row, column and diagonal has the same total): 16 31 10 | ? 19 25 | 28 7 22. What is the missing number?
15. 15.55 × ? = 5500
16. 16.495 + 594 =
17. 17.A father is 39 years old and his son is 14. How old was the father when the son was born?
18. 18.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.A father is 45 years old and his son is 5. How old was the father when the son was born?
20. 20.Magic square (every row, column and diagonal has the same total): 21 7 17 | ? 15 19 | 13 23 9. What is the missing number?
21. 21.1 + 2 + 3 + … + 8 =
22. 22.9 × 2 =
23. 23.72?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
24. 24.Magic square (every row, column and diagonal has the same total): 26 29 14 | 11 ? 35 | 32 17 20. What is the missing number?
25. 25.Magic trick! Think of 2. Double it, add 18, halve it, then take away 2. What number do you get?
26. 26.Odd one out: which number is NOT in the 9 times table? (a) 27 (b) 54 (c) 37 (d) 45
27. 27.1 + 3 + 5 + … + 39 =
28. 28.What comes next? 19, 26, 33, 40, ? (a) 40 (b) 47 (c) 54 (d) 48
29. 29.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 36 (c) 38 (d) 37
30. 30.19 × 4 =
31. 31.9 × 2 = ?8 — what is the missing digit?
32. 32.12345679 × 18 =
33. 33.What comes next? 9, 16, 25, 36, ? (a) 49 (b) 50 (c) 47 (d) 51
34. 34.Half of 32 =
35. 35.3?50 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
36. 36.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.I thought of a number, added 2 and then doubled it. I got 28. What was my number?
38. 38.The 8th of a month is a Saturday. What day is the 22nd of the same month? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
39. 39.31 × 4 =
40. 40.If today is Tuesday, what day was it 33 days ago? (a) Friday (b) Thursday (c) Sunday (d) Wednesday

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