Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 242 · 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.Magic square (every row, column and diagonal has the same total): 10 15 ? | 9 11 13 | 14 7 12. What is the missing number?
2. 2.A girl is 10 years old and her brother is 6 years older. How old will her brother be in 6 years?
3. 3.If today is Wednesday, what day was it 45 days ago? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
4. 4.Double 58 =
5. 5.1 + 3 + 5 + … + 49 =
6. 6.I thought of a number, added 9 and then doubled it. I got 56. What was my number?
7. 7.12345 × 8 + 5 =
8. 8.A girl is 8 years old and her brother is 5 years older. How old will her brother be in 7 years?
9. 9.36 × 4 =
10. 10.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 33 (c) 32 (d) 24
11. 11.1 + 3 + 5 + … + 11 =
12. 12.6 × 9 =
13. 13.A father is 45 years old and his son is 10. How old was the father when the son was born?
14. 14.Magic square (every row, column and diagonal has the same total): 25 ? 17 | 11 19 27 | 21 23 13. What is the missing number?
15. 15.A father is 42 years old and his son is 8. How old was the father when the son was born?
16. 16.12345679 × 36 =
17. 17.48 × 4 =
18. 18.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Double 22 =
20. 20.22 × 1000 =
21. 21.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.A father is 32 years old and his son is 8. How old was the father when the son was born?
23. 23.Take 63 and take away the sum of its digits. What do you get?
24. 24.Magic square (every row, column and diagonal has the same total): 14 29 26 | 35 23 ? | 20 17 32. What is the missing number?
25. 25.111 × 111 =
26. 26.I thought of a number, added 2 and then doubled it. I got 32. What was my number?
27. 27.Magic trick! Think of 8. Double it, add 8, halve it, then take away 8. What number do you get?
28. 28.If today is Monday, what day will it be after 17 days? (a) Friday (b) Wednesday (c) Thursday (d) Sunday
29. 29.9 × 10 =
30. 30.I thought of a number, multiplied it by 5 and added 8. I got 33. What was my number?
31. 31.A girl is 6 years old and her brother is 4 years older. How old will her brother be in 7 years?
32. 32.11 × 4 =
33. 33.41 × 4 =
34. 34.If today is Thursday, what day will it be after 19 days? (a) Wednesday (b) Monday (c) Tuesday (d) Friday
35. 35.Do the 1089 trick with 689: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.The ages of two twins add up to 18. How old is each twin?
37. 37.1 + 2 + 3 + … + 35 =
38. 38.If today is Thursday, what day will it be after 47 days? (a) Friday (b) Wednesday (c) Tuesday (d) Monday
39. 39.If today is Sunday, what day was it 60 days ago? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
40. 40.9 × 6 =

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