Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 796 · 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. 1.9 × 3 = ?7 — what is the missing digit?
2. 2.Magic square (every row, column and diagonal has the same total): 6 7 2 | 1 5 9 | 8 3 ?. What is the missing number?
3. 3.22 × 4 =
4. 4.2 × 9 =
5. 5.3 × 9 =
6. 6.7 × 9 =
7. 7.If today is Thursday, what day was it 28 days ago? (a) Sunday (b) Wednesday (c) Thursday (d) Friday
8. 8.Odd one out: which number is NOT in the 8 times table? (a) 56 (b) 24 (c) 48 (d) 70
9. 9.What comes next? 5, 11, 17, 23, ? (a) 30 (b) 35 (c) 29 (d) 23
10. 10.549? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.Odd one out: which number is NOT in the 4 times table? (a) 28 (b) 18 (c) 20 (d) 16
12. 12.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 24 (c) 39 (d) 8
13. 13.?499 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.Take 12 and take away the sum of its digits. What do you get?
15. 15.59 × 4 =
16. 16.9 × 5 = ?5 — what is the missing digit?
17. 17.590? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
18. 18.If today is Saturday, what day was it 8 days ago? (a) Monday (b) Saturday (c) Thursday (d) Friday
19. 19.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 49 (c) 42 (d) 48
20. 20.9 × 6 =
21. 21.The 7th of a month is a Tuesday. What day is the 24th of the same month? (a) Friday (b) Thursday (c) Saturday (d) Monday
22. 22.579 × ? = 5790
23. 23.9 × 1 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Magic square (every row, column and diagonal has the same total): 11 25 15 | 21 17 13 | 19 ? 23. What is the missing number?
26. 26.9 × 10 =
27. 27.Double 44 =
28. 28.9 × 2 = ?8 — what is the missing digit?
29. 29.940 × 10 =
30. 30.44 × 4 =
31. 31.9 × 10 = ?0 — what is the missing digit?
32. 32.343 × 10 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.12345678 × 8 + 8 =
35. 35.Do the 1089 trick with 674: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.The 4th of a month is a Saturday. What day is the 17th of the same month? (a) Thursday (b) Saturday (c) Friday (d) Monday
37. 37.1 + 2 + 3 + … + 99 =
38. 38.If today is Monday, what day will it be after 47 days? (a) Friday (b) Saturday (c) Sunday (d) Tuesday
39. 39.1 + 2 + 3 + … + 39 =
40. 40.1?40 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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