Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 967 · 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. 1.57?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
2. 2.27 × 10 =
3. 3.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Magic square (every row, column and diagonal has the same total): 13 27 ? | 23 19 15 | 21 11 25. What is the missing number?
5. 5.Magic square (every row, column and diagonal has the same total): 4 ? 2 | 3 5 7 | 8 1 6. What is the missing number?
6. 6.Take 32 and take away the sum of its digits. What do you get?
7. 7.Magic square (every row, column and diagonal has the same total): 31 16 19 | 10 22 34 | 25 28 ?. What is the missing number?
8. 8.Magic trick! Think of 14. Double it, add 10, halve it, then take away 14. What number do you get?
9. 9.1 + 2 + 3 + … + 31 =
10. 10.Take 29 and take away the sum of its digits. What do you get?
11. 11.Magic square (every row, column and diagonal has the same total): 12 2 16 | 14 10 6 | 4 18 ?. What is the missing number?
12. 12.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Magic trick! Think of 7. Double it, add 4, halve it, then take away 7. What number do you get?
14. 14.If today is Tuesday, what day will it be after 52 days? (a) Friday (b) Saturday (c) Thursday (d) Monday
15. 15.1 + 2 + 3 + … + 92 =
16. 16.43 × 4 =
17. 17.31 × 4 =
18. 18.6 × 9 =
19. 19.9 × 6 =
20. 20.9 × 9 =
21. 21.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 23 (c) 25 (d) 27
22. 22.A girl is 5 years old and her brother is 5 years older. How old will her brother be in 4 years?
23. 23.1 × 9 =
24. 24.3 × 9 =
25. 25.1 + 3 + 5 + … + 11 =
26. 26.Magic square (every row, column and diagonal has the same total): 33 12 ? | 18 24 30 | 21 36 15. What is the missing number?
27. 27.Half of 26 =
28. 28.1 + 3 + 5 + … + 23 =
29. 29.If today is Saturday, what day will it be after 87 days? (a) Wednesday (b) Tuesday (c) Friday (d) Monday
30. 30.9 × 10 =
31. 31.If today is Monday, what day will it be after 41 days? (a) Sunday (b) Wednesday (c) Monday (d) Saturday
32. 32.9 × 5 = ?5 — what is the missing digit?
33. 33.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 49 (c) 50 (d) 51
34. 34.In 3 years a boy will be 17 years old. How old was he 7 years ago?
35. 35.12345679 × 72 =
36. 36.Take 95 and take away the sum of its digits. What do you get?
37. 37.Take 38 and take away the sum of its digits. What do you get?
38. 38.Double 75 =
39. 39.Double 24 =
40. 40.Half of 54 =

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