Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 848 · 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 Tuesday, what day will it be after 61 days? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
2. 2.39 × ? = 39000
3. 3.Double 48 =
4. 4.Half of 122 =
5. 5.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.3 × 9 =
7. 7.37 × 12 =
8. 8.If today is Sunday, what day was it 22 days ago? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
9. 9.Half of 176 =
10. 10.9 × 3 = 2? — what is the missing digit?
11. 11.11 × 4 =
12. 12.17 × ? = 17000
13. 13.7?08 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.The 5th of a month is a Monday. What day is the 20th of the same month? (a) Friday (b) Tuesday (c) Wednesday (d) Monday
15. 15.12345678 × 9 + 9 =
16. 16.2 × 9 =
17. 17.9 × 5 = ?5 — what is the missing digit?
18. 18.Double 99 =
19. 19.I thought of a number, added 8 and then doubled it. I got 36. What was my number?
20. 20.If today is Wednesday, what day will it be after 99 days? (a) Sunday (b) Friday (c) Thursday (d) Wednesday
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.80 × ? = 8000
23. 23.Half of 182 =
24. 24.1 + 2 + 3 + … + 38 =
25. 25.Magic square (every row, column and diagonal has the same total): 14 ? 10 | 9 13 17 | 16 11 12. What is the missing number?
26. 26.Half of 12 =
27. 27.9 × 9 =
28. 28.213 × ? = 2130
29. 29.A father is 36 years old and his son is 10. How old was the father when the son was born?
30. 30.Double 81 =
31. 31.What comes next? 3, 10, 17, 24, ? (a) 31 (b) 38 (c) 32 (d) 24
32. 32.82 × ? = 8200
33. 33.?340 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
34. 34.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 82 (c) 83 (d) 81
35. 35.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Double 87 =
37. 37.If today is Saturday, what day was it 14 days ago? (a) Saturday (b) Tuesday (c) Sunday (d) Friday
38. 38.12345678 × 8 + 8 =
39. 39.Magic square (every row, column and diagonal has the same total): 8 22 12 | ? 14 10 | 16 6 20. What is the missing number?
40. 40.Half of 134 =

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