Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 500 · 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 × 5 = ?5 — what is the missing digit?
2. 2.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
3. 3.Half of 82 =
4. 4.495 + 594 =
5. 5.1 × 9 =
6. 6.35 × ? = 3500
7. 7.Half of 66 =
8. 8.9 × 7 =
9. 9.In 4 years a boy will be 14 years old. How old was he 3 years ago?
10. 10.15 × ? = 150
11. 11.11111 × 11111 =
12. 12.46 × 4 =
13. 13.Odd one out: which number is NOT in the 7 times table? (a) 16 (b) 28 (c) 49 (d) 42
14. 14.I thought of a number, added 2 and then doubled it. I got 12. What was my number?
15. 15.690? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.15 × 4 =
17. 17.Half of 102 =
18. 18.21 × 4 =
19. 19.9 × 2 =
20. 20.Half of 188 =
21. 21.If today is Friday, what day was it 57 days ago? (a) Wednesday (b) Friday (c) Sunday (d) Thursday
22. 22.1 + 3 + 5 + … + 21 =
23. 23.Magic square (every row, column and diagonal has the same total): ? 24 10 | 12 16 20 | 22 8 18. What is the missing number?
24. 24.9 × 6 = ?4 — what is the missing digit?
25. 25.7?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
26. 26.11 × 100 =
27. 27.22 × 1000 =
28. 28.If today is Thursday, what day will it be after 95 days? (a) Thursday (b) Tuesday (c) Monday (d) Sunday
29. 29.Double 87 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
31. 31.9 × 9 =
32. 32.Odd one out: which number is NOT in the 7 times table? (a) 49 (b) 29 (c) 42 (d) 28
33. 33.If today is Sunday, what day will it be after 68 days? (a) Thursday (b) Friday (c) Saturday (d) Monday
34. 34.I thought of a number, multiplied it by 4 and added 4. I got 44. What was my number?
35. 35.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 8 (c) 9 (d) 28
36. 36.If today is Monday, what day will it be after 61 days? (a) Sunday (b) Friday (c) Tuesday (d) Saturday
37. 37.The ages of two twins add up to 22. How old is each twin?
38. 38.405? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
39. 39.Half of 92 =
40. 40.6 × 9 =

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