Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 63 · 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 Sunday, what day will it be after 53 days? (a) Sunday (b) Friday (c) Thursday (d) Wednesday
2. 2.I thought of a number, multiplied it by 5 and added 3. I got 73. What was my number?
3. 3.A girl is 9 years old and her brother is 4 years older. How old will her brother be in 8 years?
4. 4.15 × ? = 15000
5. 5.Magic square (every row, column and diagonal has the same total): 10 15 14 | 17 13 9 | 12 ? 16. What is the missing number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.583 × 10 =
8. 8.The 8th of a month is a Friday. What day is the 19th of the same month? (a) Friday (b) Tuesday (c) Wednesday (d) Monday
9. 9.What comes next? 18, 25, 32, 39, ? (a) 46 (b) 53 (c) 47 (d) 39
10. 10.81 × 100 =
11. 11.Do the 1089 trick with 539: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.1 + 3 + 5 + … + 39 =
13. 13.2?55 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.714? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.A girl is 11 years old and her brother is 5 years older. How old will her brother be in 2 years?
16. 16.Double 33 =
17. 17.If today is Tuesday, what day will it be after 38 days? (a) Thursday (b) Saturday (c) Monday (d) Friday
18. 18.9 × 4 = ?6 — what is the missing digit?
19. 19.46 × 4 =
20. 20.Magic square (every row, column and diagonal has the same total): 4 14 12 | 18 ? 2 | 8 6 16. What is the missing number?
21. 21.Half of 72 =
22. 22.I thought of a number, multiplied it by 2 and added 3. I got 29. What was my number?
23. 23.A girl is 6 years old and her brother is 3 years older. How old will her brother be in 7 years?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Take 23 and take away the sum of its digits. What do you get?
26. 26.Magic square (every row, column and diagonal has the same total): 18 20 10 | 8 16 24 | 22 12 ?. What is the missing number?
27. 27.Half of 74 =
28. 28.9 × 10 = ?0 — what is the missing digit?
29. 29.12345 × 8 + 5 =
30. 30.1 + 2 + 3 + … + 31 =
31. 31.9 × 4 =
32. 32.12345679 × 72 =
33. 33.71?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
34. 34.1 + 3 + 5 + … + 15 =
35. 35.Half of 62 =
36. 36.Magic square (every row, column and diagonal has the same total): 5 ? 13 | 19 11 3 | 9 7 17. What is the missing number?
37. 37.Magic square (every row, column and diagonal has the same total): 8 6 ? | 18 10 2 | 4 14 12. What is the missing number?
38. 38.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 38 (c) 37 (d) 36
39. 39.2 × 9 =
40. 40.1 + 2 + 3 + … + 7 =

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