Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 597 · 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): 16 26 12 | 14 18 22 | ? 10 20. What is the missing number?
2. 2.9 × 7 = ?3 — what is the missing digit?
3. 3.Magic square (every row, column and diagonal has the same total): ? 28 25 | 34 22 10 | 19 16 31. What is the missing number?
4. 4.A girl is 8 years old and her brother is 4 years older. How old will her brother be in 9 years?
5. 5.Think of 3. Multiply it by 4, then add 2. What number do you end with?
6. 6.I thought of a number, added 5 and then doubled it. I got 26. What was my number?
7. 7.1234 × 8 + 4 =
8. 8.Double 38 =
9. 9.9 × 9 =
10. 10.Magic square (every row, column and diagonal has the same total): 2 7 6 | 9 ? 1 | 4 3 8. What is the missing number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.1 × 9 =
13. 13.7 × 9 =
14. 14.56 × 4 =
15. 15.1 + 3 + 5 + … + 11 =
16. 16.1 + 2 + 3 + … + 29 =
17. 17.If today is Wednesday, what day will it be after 22 days? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
18. 18.1234 × 9 + 5 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Double 31 =
21. 21.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 38 (c) 36 (d) 37
22. 22.8 × 9 =
23. 23.The 1st of a month is a Tuesday. What day is the 28th of the same month? (a) Thursday (b) Tuesday (c) Monday (d) Sunday
24. 24.Magic square (every row, column and diagonal has the same total): 22 ? 10 | 7 19 31 | 28 13 16. What is the missing number?
25. 25.Magic square (every row, column and diagonal has the same total): 10 5 6 | 3 7 11 | 8 9 ?. What is the missing number?
26. 26.Half of 74 =
27. 27.1 + 2 + 3 + … + 84 =
28. 28.5 × 9 =
29. 29.Double 85 =
30. 30.12345679 × 36 =
31. 31.3?49 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.?156 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
33. 33.601 × 10 =
34. 34.The ages of two twins add up to 16. How old is each twin?
35. 35.If today is Monday, what day will it be after 27 days? (a) Sunday (b) Monday (c) Saturday (d) Wednesday
36. 36.59 × 4 =
37. 37.What comes next? 6, 14, 22, 30, ? (a) 46 (b) 39 (c) 38 (d) 30
38. 38.If today is Wednesday, what day will it be after 65 days? (a) Monday (b) Thursday (c) Saturday (d) Friday
39. 39.I thought of a number, added 6 and then doubled it. I got 22. What was my number?
40. 40.12345679 × 27 =

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