Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 444 · 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. 1.1111 × 1111 =
2. 2.If today is Monday, what day will it be after 43 days? (a) Wednesday (b) Friday (c) Monday (d) Tuesday
3. 3.69? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.9 × 3 = ?7 — what is the missing digit?
5. 5.9 × 8 =
6. 6.9 × 10 =
7. 7.What comes next? 1, 2, 4, 8, ? (a) 12 (b) 14 (c) 17 (d) 16
8. 8.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.37 × 21 =
10. 10.9 × 9 = ?1 — what is the missing digit?
11. 11.1 + 2 + 3 + … + 14 =
12. 12.If today is Monday, what day will it be after 31 days? (a) Thursday (b) Friday (c) Wednesday (d) Sunday
13. 13.12345 × 9 + 6 =
14. 14.Half of 194 =
15. 15.9 × 8 = ?2 — what is the missing digit?
16. 16.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 27 (c) 23 (d) 25
17. 17.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Magic square (every row, column and diagonal has the same total): 25 11 21 | 15 ? 23 | 17 27 13. What is the missing number?
19. 19.What comes next? 16, 23, 30, 37, ? (a) 51 (b) 44 (c) 45 (d) 37
20. 20.The ages of two twins add up to 10. How old is each twin?
21. 21.9 × 4 =
22. 22.427 × ? = 4270
23. 23.Double 91 =
24. 24.Think of 12. Multiply it by 4, then add 6. What number do you end with?
25. 25.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.30 × ? = 30000
27. 27.Half of 58 =
28. 28.297 + 792 =
29. 29.50 × 100 =
30. 30.Odd one out: which number is NOT in the 3 times table? (a) 18 (b) 22 (c) 12 (d) 6
31. 31.Magic square (every row, column and diagonal has the same total): 20 6 16 | 10 ? 18 | 12 22 8. What is the missing number?
32. 32.Magic square (every row, column and diagonal has the same total): 9 19 ? | 7 11 15 | 17 3 13. What is the missing number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
34. 34.888 × ? = 8880
35. 35.What comes next? 8, 11, 14, 17, ? (a) 21 (b) 17 (c) 23 (d) 20
36. 36.A girl is 8 years old and her brother is 3 years older. How old will her brother be in 6 years?
37. 37.Think of 8. Multiply it by 5, then add 7. What number do you end with?
38. 38.If today is Thursday, what day will it be after 44 days? (a) Saturday (b) Sunday (c) Tuesday (d) Friday
39. 39.A father is 40 years old and his son is 7. How old was the father when the son was born?
40. 40.In 3 years a boy will be 15 years old. How old was he 2 years ago?

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