Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 943 · 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.Take 32 and take away the sum of its digits. What do you get?
2. 2.1 + 3 + 5 + … + 21 =
3. 3.11 × 100 =
4. 4.I thought of a number, multiplied it by 2 and added 8. I got 18. What was my number?
5. 5.1 + 2 + 3 + … + 53 =
6. 6.1 + 2 + 3 + … + 87 =
7. 7.If today is Monday, what day was it 46 days ago? (a) Sunday (b) Friday (c) Thursday (d) Wednesday
8. 8.297 + 792 =
9. 9.37 × 24 =
10. 10.767? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.1 + 2 + 3 + … + 68 =
12. 12.Magic square (every row, column and diagonal has the same total): 17 10 15 | 12 14 16 | 13 ? 11. What is the missing number?
13. 13.96 × 100 =
14. 14.1234 × 8 + 4 =
15. 15.What comes next? 11, 15, 19, 23, ? (a) 31 (b) 23 (c) 28 (d) 27
16. 16.15 × 4 =
17. 17.12345679 × 18 =
18. 18.12345 × 9 + 6 =
19. 19.Think of 6. Multiply it by 2, then add 2. What number do you end with?
20. 20.A girl is 5 years old and her brother is 6 years older. How old will her brother be in 3 years?
21. 21.9 × 6 =
22. 22.10 × 9 =
23. 23.Magic square (every row, column and diagonal has the same total): 27 12 ? | 6 18 30 | 21 24 9. What is the missing number?
24. 24.Magic square (every row, column and diagonal has the same total): 16 2 12 | 6 10 ? | 8 18 4. What is the missing number?
25. 25.891 + 198 =
26. 26.Think of 8. Multiply it by 3, then add 4. What number do you end with?
27. 27.Magic square (every row, column and diagonal has the same total): 8 1 6 | ? 5 7 | 4 9 2. What is the missing number?
28. 28.Odd one out: which number is NOT in the 6 times table? (a) 53 (b) 18 (c) 30 (d) 24
29. 29.I thought of a number, multiplied it by 5 and added 2. I got 47. What was my number?
30. 30.Magic square (every row, column and diagonal has the same total): 9 8 13 | 14 10 6 | 7 12 ?. What is the missing number?
31. 31.If today is Tuesday, what day was it 48 days ago? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
32. 32.Double 56 =
33. 33.If today is Wednesday, what day will it be after 15 days? (a) Thursday (b) Wednesday (c) Friday (d) Sunday
34. 34.I thought of a number, added 3 and then doubled it. I got 26. What was my number?
35. 35.9 × 9 =
36. 36.Think of 9. Multiply it by 4, then add 3. What number do you end with?
37. 37.1 + 2 + 3 + … + 97 =
38. 38.232 × 10 =
39. 39.8 × 9 =
40. 40.The 3rd of a month is a Friday. What day is the 18th of the same month? (a) Tuesday (b) Sunday (c) Friday (d) Saturday

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