Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 151 · 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.Double 65 =
2. 2.4 × 9 =
3. 3.Odd one out: which number is NOT in the 6 times table? (a) 12 (b) 39 (c) 18 (d) 24
4. 4.Think of 5. Multiply it by 3, then add 5. What number do you end with?
5. 5.If today is Sunday, what day will it be after 61 days? (a) Friday (b) Monday (c) Thursday (d) Saturday
6. 6.Magic trick! Think of 16. Double it, add 12, halve it, then take away 16. What number do you get?
7. 7.If today is Saturday, what day was it 14 days ago? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
8. 8.9 × 10 = 9? — what is the missing digit?
9. 9.594 + 495 =
10. 10.Double 51 =
11. 11.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 37 (c) 36 (d) 34
12. 12.If today is Thursday, what day will it be after 65 days? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
13. 13.Think of 10. Multiply it by 5, then add 3. What number do you end with?
14. 14.The 1st of a month is a Thursday. What day is the 9th of the same month? (a) Friday (b) Saturday (c) Monday (d) Thursday
15. 15.A father is 34 years old and his son is 14. How old was the father when the son was born?
16. 16.39 × 4 =
17. 17.37 × 6 =
18. 18.I thought of a number, multiplied it by 5 and added 3. I got 58. What was my number?
19. 19.11111 × 11111 =
20. 20.If today is Wednesday, what day was it 43 days ago? (a) Monday (b) Tuesday (c) Wednesday (d) Friday
21. 21.43 × 4 =
22. 22.111 × 111 =
23. 23.123456 × 9 + 7 =
24. 24.46 × 4 =
25. 25.50 × 1000 =
26. 26.Magic trick! Think of 3. Double it, add 12, halve it, then take away 3. What number do you get?
27. 27.I thought of a number, added 1 and then doubled it. I got 20. What was my number?
28. 28.1 × 9 =
29. 29.1 + 2 + 3 + … + 71 =
30. 30.If today is Tuesday, what day was it 45 days ago? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
31. 31.9 × 3 = ?7 — what is the missing digit?
32. 32.If today is Wednesday, what day will it be after 53 days? (a) Wednesday (b) Sunday (c) Saturday (d) Monday
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
34. 34.What comes next? 12, 16, 20, 24, ? (a) 29 (b) 32 (c) 24 (d) 28
35. 35.Magic square (every row, column and diagonal has the same total): ? 11 25 | 23 19 15 | 13 27 17. What is the missing number?
36. 36.123456 × 8 + 6 =
37. 37.Magic square (every row, column and diagonal has the same total): 9 14 7 | 8 10 ? | 13 6 11. What is the missing number?
38. 38.Magic square (every row, column and diagonal has the same total): 7 ? 9 | 8 6 4 | 3 10 5. What is the missing number?
39. 39.9 × 8 = ?2 — what is the missing digit?
40. 40.Magic square (every row, column and diagonal has the same total): 6 11 4 | ? 7 9 | 10 3 8. What is the missing number?

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