Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 210 · 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. 1.9 × 4 =
2. 2.Magic square (every row, column and diagonal has the same total): 11 26 23 | 32 20 ? | 17 14 29. What is the missing number?
3. 3.9 × 2 = ?8 — what is the missing digit?
4. 4.9 × 7 = 6? — what is the missing digit?
5. 5.9 × 9 =
6. 6.12345679 × 54 =
7. 7.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Magic trick! Think of 12. Double it, add 18, halve it, then take away 12. What number do you get?
9. 9.9 × 8 = 7? — what is the missing digit?
10. 10.37 × 12 =
11. 11.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 98 (c) 102 (d) 100
12. 12.If today is Wednesday, what day was it 59 days ago? (a) Sunday (b) Saturday (c) Wednesday (d) Monday
13. 13.If today is Saturday, what day was it 28 days ago? (a) Saturday (b) Sunday (c) Tuesday (d) Friday
14. 14.18 × 4 =
15. 15.1 + 3 + 5 + … + 31 =
16. 16.663 × 10 =
17. 17.Magic trick! Think of 18. Double it, add 4, halve it, then take away 18. What number do you get?
18. 18.27 × ? = 27000
19. 19.1 + 3 + 5 + … + 45 =
20. 20.Magic square (every row, column and diagonal has the same total): 14 15 ? | 9 13 17 | 16 11 12. What is the missing number?
21. 21.If today is Sunday, what day was it 41 days ago? (a) Tuesday (b) Thursday (c) Monday (d) Sunday
22. 22.If today is Sunday, what day will it be after 76 days? (a) Friday (b) Sunday (c) Tuesday (d) Saturday
23. 23.32 × 100 =
24. 24.1 + 2 + 3 + … + 8 =
25. 25.Double 44 =
26. 26.5?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.538 × ? = 5380
28. 28.19 × 1000 =
29. 29.I thought of a number, multiplied it by 2 and added 7. I got 25. What was my number?
30. 30.Double 62 =
31. 31.Take 71 and take away the sum of its digits. What do you get?
32. 32.If today is Friday, what day will it be after 49 days? (a) Thursday (b) Monday (c) Friday (d) Saturday
33. 33.9 × 2 =
34. 34.40 × 4 =
35. 35.In 3 years a boy will be 11 years old. How old was he 4 years ago?
36. 36.A girl is 11 years old and her brother is 4 years older. How old will her brother be in 2 years?
37. 37.13 × 4 =
38. 38.Take 81 and take away the sum of its digits. What do you get?
39. 39.A piggy bank has 6 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
40. 40.297 + 792 =

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