Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 430 · 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.Half of 124 =
2. 2.693 + 396 =
3. 3.Magic trick! Think of 13. Double it, add 8, halve it, then take away 13. What number do you get?
4. 4.9 × 9 = 8? — what is the missing digit?
5. 5.1 + 2 + 3 + … + 20 =
6. 6.24? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
7. 7.13 × 1000 =
8. 8.1234567 × 9 + 8 =
9. 9.Magic square (every row, column and diagonal has the same total): 12 7 8 | 5 ? 13 | 10 11 6. What is the missing number?
10. 10.Magic square (every row, column and diagonal has the same total): 3 10 5 | 8 6 4 | 7 ? 9. What is the missing number?
11. 11.Take 88 and take away the sum of its digits. What do you get?
12. 12.?926 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
13. 13.38 × 100 =
14. 14.60 × 4 =
15. 15.?116 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.In 4 years a boy will be 15 years old. How old was he 7 years ago?
17. 17.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 9 (c) 12 (d) 13
18. 18.1 + 2 + 3 + … + 71 =
19. 19.Take 38 and take away the sum of its digits. What do you get?
20. 20.9 × 8 = 7? — what is the missing digit?
21. 21.9 × 10 =
22. 22.Magic square (every row, column and diagonal has the same total): 13 28 ? | 10 16 22 | 25 4 19. What is the missing number?
23. 23.Double 76 =
24. 24.1 + 2 + 3 + … + 11 =
25. 25.12345678 × 8 + 8 =
26. 26.1 + 2 + 3 + … + 90 =
27. 27.Half of 62 =
28. 28.If today is Monday, what day will it be after 30 days? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
29. 29.9 × 2 =
30. 30.A father is 43 years old and his son is 8. How old was the father when the son was born?
31. 31.31 × 4 =
32. 32.37 × 21 =
33. 33.The 4th of a month is a Sunday. What day is the 17th of the same month? (a) Friday (b) Sunday (c) Saturday (d) Tuesday
34. 34.What comes next? 15, 17, 19, 21, ? (a) 24 (b) 25 (c) 23 (d) 21
35. 35.1 + 3 + 5 + … + 9 =
36. 36.A girl is 11 years old and her brother is 4 years older. How old will her brother be in 3 years?
37. 37.I thought of a number, added 6 and then doubled it. I got 40. What was my number?
38. 38.10 × 1000 =
39. 39.I thought of a number, multiplied it by 5 and added 1. I got 51. What was my number?
40. 40.A piggy bank has 4 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?

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