Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 585 · 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 132 =
2. 2.Double 36 =
3. 3.Magic square (every row, column and diagonal has the same total): 19 ? 11 | 5 13 21 | 15 17 7. What is the missing number?
4. 4.1 + 2 + 3 + … + 29 =
5. 5.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
6. 6.8 × 9 =
7. 7.9 × 4 =
8. 8.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Double 81 =
10. 10.1 + 2 + 3 + … + 58 =
11. 11.Half of 192 =
12. 12.9 × 6 =
13. 13.9 × 2 = ?8 — what is the missing digit?
14. 14.1 + 2 + 3 + … + 57 =
15. 15.If today is Thursday, what day will it be after 56 days? (a) Thursday (b) Sunday (c) Wednesday (d) Friday
16. 16.The 3rd of a month is a Wednesday. What day is the 25th of the same month? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
17. 17.1111 × 1111 =
18. 18.44 × 100 =
19. 19.Magic trick! Think of 12. Double it, add 18, halve it, then take away 12. What number do you get?
20. 20.20 × 4 =
21. 21.21 × 1000 =
22. 22.If today is Friday, what day will it be after 83 days? (a) Friday (b) Wednesday (c) Thursday (d) Sunday
23. 23.If today is Monday, what day will it be after 20 days? (a) Wednesday (b) Sunday (c) Saturday (d) Monday
24. 24.Take 19 and take away the sum of its digits. What do you get?
25. 25.Magic square (every row, column and diagonal has the same total): 15 ? 27 | 30 18 6 | 9 24 21. What is the missing number?
26. 26.9 × 8 =
27. 27.Half of 142 =
28. 28.158? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
29. 29.Half of 168 =
30. 30.Half of 42 =
31. 31.6 × 1000 =
32. 32.46 × 4 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
34. 34.I thought of a number, added 1 and then doubled it. I got 10. What was my number?
35. 35.Odd one out: which number is NOT in the 6 times table? (a) 18 (b) 24 (c) 36 (d) 25
36. 36.What comes next? 14, 16, 18, 20, ? (a) 20 (b) 22 (c) 23 (d) 24
37. 37.Take 65 and take away the sum of its digits. What do you get?
38. 38.43 × 100 =
39. 39.Half of 98 =
40. 40.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?

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