Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 787 · 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 896: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.31 × 4 =
3. 3.9 × 9 = ?1 — what is the missing digit?
4. 4.225 × 10 =
5. 5.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 27 (c) 23 (d) 26
6. 6.111 × 111 =
7. 7.Magic square (every row, column and diagonal has the same total): 3 10 5 | ? 6 4 | 7 2 9. What is the missing number?
8. 8.If today is Monday, what day was it 12 days ago? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
9. 9.?76 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
10. 10.865 × ? = 8650
11. 11.1 + 3 + 5 + … + 21 =
12. 12.9 × 6 = ?4 — what is the missing digit?
13. 13.Odd one out: which number is NOT in the 8 times table? (a) 32 (b) 24 (c) 16 (d) 62
14. 14.9 × 5 =
15. 15.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 51 (c) 50 (d) 49
16. 16.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.6 × 9 =
18. 18.Double 46 =
19. 19.693 + 396 =
20. 20.407 × 10 =
21. 21.I thought of a number, added 1 and then doubled it. I got 34. What was my number?
22. 22.1 + 2 + 3 + … + 75 =
23. 23.Magic square (every row, column and diagonal has the same total): ? 12 22 | 24 16 8 | 10 20 18. What is the missing number?
24. 24.Half of 72 =
25. 25.5 × 9 =
26. 26.Magic square (every row, column and diagonal has the same total): 15 25 11 | 13 17 21 | 23 ? 19. What is the missing number?
27. 27.1 + 2 + 3 + … + 59 =
28. 28.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.9 × 10 =
31. 31.Take 75 and take away the sum of its digits. What do you get?
32. 32.1 + 3 + 5 + … + 15 =
33. 33.123 × 8 + 3 =
34. 34.The ages of two twins add up to 10. How old is each twin?
35. 35.I thought of a number, multiplied it by 5 and added 1. I got 51. What was my number?
36. 36.9 × 8 = ?2 — what is the missing digit?
37. 37.9 × 5 = 4? — what is the missing digit?
38. 38.9 × 6 = 5? — what is the missing digit?
39. 39.20 × 1000 =
40. 40.Double 75 =

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