Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 802 · 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. 1.1234 × 9 + 5 =
2. 2.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Magic square (every row, column and diagonal has the same total): 19 21 11 | 9 17 25 | 23 ? 15. What is the missing number?
4. 4.In 2 years a boy will be 14 years old. How old was he 5 years ago?
5. 5.If today is Monday, what day was it 44 days ago? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
6. 6.Odd one out: which number is NOT in the 6 times table? (a) 56 (b) 12 (c) 42 (d) 30
7. 7.32 × 4 =
8. 8.9 × 7 = ?3 — what is the missing digit?
9. 9.I thought of a number, multiplied it by 3 and added 1. I got 46. What was my number?
10. 10.6 × 1000 =
11. 11.37 × 12 =
12. 12.Double 68 =
13. 13.Magic square (every row, column and diagonal has the same total): 9 4 5 | 2 ? 10 | 7 8 3. What is the missing number?
14. 14.9 × 3 = 2? — what is the missing digit?
15. 15.43 × 4 =
16. 16.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 36 (c) 48 (d) 42
17. 17.1 + 3 + 5 + … + 25 =
18. 18.1 + 2 + 3 + … + 16 =
19. 19.111 × 111 =
20. 20.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.12 × 8 + 2 =
22. 22.891 + 198 =
23. 23.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.48 × ? = 4800
25. 25.1 × 9 =
26. 26.Magic square (every row, column and diagonal has the same total): 16 18 8 | 6 14 22 | ? 10 12. What is the missing number?
27. 27.If today is Wednesday, what day was it 55 days ago? (a) Friday (b) Sunday (c) Wednesday (d) Thursday
28. 28.9 × 1 =
29. 29.What comes next? 13, 18, 23, 28, ? (a) 34 (b) 28 (c) 33 (d) 38
30. 30.12345679 × 27 =
31. 31.What comes next? 11, 20, 29, 38, ? (a) 47 (b) 56 (c) 48 (d) 38
32. 32.Magic trick! Think of 16. Double it, add 12, halve it, then take away 16. What number do you get?
33. 33.Magic square (every row, column and diagonal has the same total): ? 4 19 | 10 16 22 | 13 28 7. What is the missing number?
34. 34.69 × 10 =
35. 35.If today is Sunday, what day will it be after 88 days? (a) Friday (b) Thursday (c) Sunday (d) Wednesday
36. 36.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.If today is Thursday, what day will it be after 93 days? (a) Tuesday (b) Saturday (c) Friday (d) Sunday
38. 38.4 × 9 =
39. 39.If today is Monday, what day will it be after 65 days? (a) Thursday (b) Saturday (c) Tuesday (d) Wednesday
40. 40.9 × 8 = ?2 — what is the missing digit?

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