Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 20 · 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 2nd of a month is a Thursday. What day is the 24th of the same month? (a) Friday (b) Monday (c) Thursday (d) Saturday
2. 2.1 + 3 + 5 + … + 33 =
3. 3.4 × 9 =
4. 4.9 × 10 = 9? — what is the missing digit?
5. 5.If today is Thursday, what day will it be after 35 days? (a) Friday (b) Wednesday (c) Sunday (d) Thursday
6. 6.Magic square (every row, column and diagonal has the same total): 13 18 11 | 12 ? 16 | 17 10 15. What is the missing number?
7. 7.1 + 3 + 5 + … + 37 =
8. 8.396 + 693 =
9. 9.Half of 132 =
10. 10.If today is Sunday, what day was it 54 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
11. 11.I thought of a number, added 2 and then doubled it. I got 36. What was my number?
12. 12.What comes next? 18, 25, 32, 39, ? (a) 46 (b) 47 (c) 53 (d) 39
13. 13.30 × 4 =
14. 14.Think of 8. Multiply it by 5, then add 9. What number do you end with?
15. 15.Half of 92 =
16. 16.1 + 3 + 5 + … + 29 =
17. 17.9 × 5 = 4? — what is the missing digit?
18. 18.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 37 (c) 34 (d) 36
19. 19.I thought of a number, added 1 and then doubled it. I got 24. What was my number?
20. 20.A father is 38 years old and his son is 14. How old was the father when the son was born?
21. 21.Magic trick! Think of 14. Double it, add 14, halve it, then take away 14. What number do you get?
22. 22.Magic square (every row, column and diagonal has the same total): 10 8 18 | 20 12 4 | 6 ? 14. What is the missing number?
23. 23.If today is Thursday, what day was it 22 days ago? (a) Wednesday (b) Tuesday (c) Thursday (d) Saturday
24. 24.12345679 × 18 =
25. 25.32 × ? = 3200
26. 26.Magic square (every row, column and diagonal has the same total): 12 ? 8 | 5 9 13 | 10 11 6. What is the missing number?
27. 27.14 × 4 =
28. 28.Take 40 and take away the sum of its digits. What do you get?
29. 29.12345 × 8 + 5 =
30. 30.51 × 4 =
31. 31.41 × 4 =
32. 32.5 × 1000 =
33. 33.Magic square (every row, column and diagonal has the same total): 21 6 27 | ? 18 12 | 9 30 15. What is the missing number?
34. 34.842 × ? = 8420
35. 35.1 + 2 + 3 + … + 22 =
36. 36.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 16 (c) 17 (d) 12
37. 37.If today is Monday, what day was it 45 days ago? (a) Saturday (b) Thursday (c) Friday (d) Monday
38. 38.I thought of a number, added 2 and then doubled it. I got 18. What was my number?
39. 39.A piggy bank has 11 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
40. 40.37 × 1000 =

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