Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 187 · 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.If today is Thursday, what day will it be after 98 days? (a) Sunday (b) Wednesday (c) Friday (d) Thursday
2. 2.59 × 4 =
3. 3.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 56 (c) 64 (d) 65
4. 4.46 × 10 =
5. 5.123 × 9 + 4 =
6. 6.9 × 3 =
7. 7.Half of 94 =
8. 8.Magic square (every row, column and diagonal has the same total): 4 ? 8 | 9 5 1 | 2 7 6. What is the missing number?
9. 9.Magic trick! Think of 17. Double it, add 6, halve it, then take away 17. What number do you get?
10. 10.20 × 4 =
11. 11.9 × 7 = ?3 — what is the missing digit?
12. 12.1 + 2 + 3 + … + 98 =
13. 13.?40 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.7 × 9 =
16. 16.123456 × 9 + 7 =
17. 17.If today is Friday, what day was it 24 days ago? (a) Monday (b) Wednesday (c) Friday (d) Tuesday
18. 18.What comes next? 5, 10, 20, 40, ? (a) 81 (b) 80 (c) 60 (d) 70
19. 19.111111 × 111111 =
20. 20.Magic square (every row, column and diagonal has the same total): 18 33 12 | 15 21 27 | 30 9 ?. What is the missing number?
21. 21.Magic square (every row, column and diagonal has the same total): 23 13 15 | 9 17 25 | 19 21 ?. What is the missing number?
22. 22.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.359 × ? = 3590
24. 24.Think of 9. Multiply it by 2, then add 9. What number do you end with?
25. 25.37 × 18 =
26. 26.Take 40 and take away the sum of its digits. What do you get?
27. 27.1 + 2 + 3 + … + 27 =
28. 28.56 × 4 =
29. 29.11111 × 11111 =
30. 30.Half of 114 =
31. 31.If today is Wednesday, what day was it 9 days ago? (a) Sunday (b) Monday (c) Thursday (d) Tuesday
32. 32.12345 × 9 + 6 =
33. 33.If today is Friday, what day will it be after 43 days? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
34. 34.9 × 2 =
35. 35.?660 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
36. 36.Odd one out: which number is NOT in the 8 times table? (a) 32 (b) 48 (c) 16 (d) 19
37. 37.Magic square (every row, column and diagonal has the same total): 19 5 15 | 9 13 17 | ? 21 7. What is the missing number?
38. 38.Double 31 =
39. 39.526 × 10 =
40. 40.Magic square (every row, column and diagonal has the same total): 19 ? 25 | 22 16 10 | 7 28 13. What is the missing number?

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