Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 466 · 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.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Half of 82 =
3. 3.50 × 4 =
4. 4.1 + 2 + 3 + … + 44 =
5. 5.11111 × 11111 =
6. 6.Odd one out: which number is NOT in the 6 times table? (a) 24 (b) 51 (c) 30 (d) 18
7. 7.9 × 10 =
8. 8.37 × 100 =
9. 9.2 × 9 =
10. 10.The 2nd of a month is a Thursday. What day is the 14th of the same month? (a) Monday (b) Wednesday (c) Tuesday (d) Friday
11. 11.9 × 7 = 6? — what is the missing digit?
12. 12.9 × 6 = ?4 — what is the missing digit?
13. 13.37 × 18 =
14. 14.Double 81 =
15. 15.Double 71 =
16. 16.23 × 1000 =
17. 17.Magic square (every row, column and diagonal has the same total): 12 17 10 | 11 13 15 | 16 ? 14. What is the missing number?
18. 18.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
19. 19.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
20. 20.If today is Friday, what day will it be after 65 days? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
21. 21.A father is 38 years old and his son is 7. How old was the father when the son was born?
22. 22.If today is Saturday, what day was it 28 days ago? (a) Friday (b) Saturday (c) Tuesday (d) Sunday
23. 23.38 × 4 =
24. 24.The 7th of a month is a Tuesday. What day is the 23rd of the same month? (a) Sunday (b) Wednesday (c) Friday (d) Thursday
25. 25.160 × 10 =
26. 26.Take 81 and take away the sum of its digits. What do you get?
27. 27.14 × 1000 =
28. 28.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 24 (c) 28 (d) 32
29. 29.Magic trick! Think of 6. Double it, add 12, halve it, then take away 6. What number do you get?
30. 30.Magic square (every row, column and diagonal has the same total): 18 8 10 | 4 ? 20 | 14 16 6. What is the missing number?
31. 31.77 × 100 =
32. 32.Magic square (every row, column and diagonal has the same total): 14 9 ? | 15 13 11 | 10 17 12. What is the missing number?
33. 33.Magic trick! Think of 10. Double it, add 10, halve it, then take away 10. What number do you get?
34. 34.27 × 4 =
35. 35.1 + 2 + 3 + … + 31 =
36. 36.16 × 4 =
37. 37.1 × 9 =
38. 38.12345679 × 54 =
39. 39.If today is Monday, what day will it be after 48 days? (a) Wednesday (b) Sunday (c) Monday (d) Saturday
40. 40.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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