Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 636 · 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.The 3rd of a month is a Wednesday. What day is the 11th of the same month? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
2. 2.594 + 495 =
3. 3.9 × 4 = 3? — what is the missing digit?
4. 4.18 × 4 =
5. 5.46 × 4 =
6. 6.Odd one out: which number is NOT in the 6 times table? (a) 18 (b) 19 (c) 42 (d) 24
7. 7.Magic square (every row, column and diagonal has the same total): 18 33 12 | 15 21 ? | 30 9 24. What is the missing number?
8. 8.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.124 × ? = 1240
10. 10.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 38 (c) 36 (d) 34
11. 11.51 × 100 =
12. 12.3 × 9 =
13. 13.12345679 × 27 =
14. 14.Take 37 and take away the sum of its digits. What do you get?
15. 15.If today is Sunday, what day was it 10 days ago? (a) Thursday (b) Friday (c) Wednesday (d) Sunday
16. 16.1234567 × 8 + 7 =
17. 17.Half of 76 =
18. 18.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 64 (c) 65 (d) 56
19. 19.What comes next? 15, 19, 23, 27, ? (a) 35 (b) 32 (c) 27 (d) 31
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.?805 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
22. 22.Half of 72 =
23. 23.Double 92 =
24. 24.The 1st of a month is a Sunday. What day is the 25th of the same month? (a) Saturday (b) Tuesday (c) Thursday (d) Wednesday
25. 25.37 × 9 =
26. 26.12345679 × 63 =
27. 27.13 × ? = 130
28. 28.5 × 9 =
29. 29.I thought of a number, multiplied it by 5 and added 5. I got 35. What was my number?
30. 30.12345 × 9 + 6 =
31. 31.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
33. 33.Magic trick! Think of 19. Double it, add 4, halve it, then take away 19. What number do you get?
34. 34.9 × 8 = 7? — what is the missing digit?
35. 35.Magic trick! Think of 6. Double it, add 8, halve it, then take away 6. What number do you get?
36. 36.6 × 9 =
37. 37.9 × 9 =
38. 38.9 × 3 = 2? — what is the missing digit?
39. 39.9 × 2 = 1? — what is the missing digit?
40. 40.891 + 198 =

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