Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 752 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
2. 2.If today is Saturday, what day will it be after 10 days? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
3. 3.9 × 2 = 1? — what is the missing digit?
4. 4.39 × 4 =
5. 5.10 × 9 =
6. 6.297 + 792 =
7. 7.9 × 8 =
8. 8.Double 26 =
9. 9.123 × 9 + 4 =
10. 10.Half of 98 =
11. 11.25 × 4 =
12. 12.The 1st of a month is a Friday. What day is the 27th of the same month? (a) Tuesday (b) Wednesday (c) Saturday (d) Thursday
13. 13.If today is Friday, what day was it 43 days ago? (a) Wednesday (b) Friday (c) Sunday (d) Thursday
14. 14.?641 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.9 × 9 =
16. 16.A father is 44 years old and his son is 11. How old was the father when the son was born?
17. 17.9 × 5 = ?5 — what is the missing digit?
18. 18.Take 39 and take away the sum of its digits. What do you get?
19. 19.Half of 154 =
20. 20.Magic trick! Think of 7. Double it, add 14, halve it, then take away 7. What number do you get?
21. 21.8 × 4 =
22. 22.Magic square (every row, column and diagonal has the same total): 17 ? 9 | 3 11 19 | 13 15 5. What is the missing number?
23. 23.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 37 (c) 36 (d) 34
24. 24.9 × 10 = 9? — what is the missing digit?
25. 25.The 2nd of a month is a Wednesday. What day is the 20th of the same month? (a) Saturday (b) Wednesday (c) Sunday (d) Monday
26. 26.The 3rd of a month is a Saturday. What day is the 23rd of the same month? (a) Thursday (b) Saturday (c) Monday (d) Friday
27. 27.9 × 7 =
28. 28.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Think of 13. Multiply it by 4, then add 5. What number do you end with?
30. 30.2 × 1000 =
31. 31.1 + 2 + 3 + … + 18 =
32. 32.560? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
33. 33.The 2nd of a month is a Friday. What day is the 15th of the same month? (a) Thursday (b) Sunday (c) Friday (d) Wednesday
34. 34.7 × 9 =
35. 35.I thought of a number, added 4 and then doubled it. I got 18. What was my number?
36. 36.28 × 4 =
37. 37.396 + 693 =
38. 38.23 × 4 =
39. 39.If today is Monday, what day will it be after 42 days? (a) Monday (b) Thursday (c) Tuesday (d) Sunday
40. 40.Magic square (every row, column and diagonal has the same total): ? 10 25 | 28 16 4 | 7 22 19. What is the missing number?

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