Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 801 · 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.What comes next? 17, 25, 33, 41, ? (a) 50 (b) 49 (c) 41 (d) 57
2. 2.671? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.The 6th of a month is a Sunday. What day is the 28th of the same month? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
4. 4.1 + 3 + 5 + … + 11 =
5. 5.252 × 10 =
6. 6.Magic square (every row, column and diagonal has the same total): 31 ? 19 | 10 22 34 | 25 28 13. What is the missing number?
7. 7.What comes next? 13, 21, 29, 37, ? (a) 37 (b) 53 (c) 45 (d) 46
8. 8.14 × 4 =
9. 9.Half of 178 =
10. 10.What comes next? 5, 10, 20, 40, ? (a) 60 (b) 70 (c) 81 (d) 80
11. 11.46 × 4 =
12. 12.Magic trick! Think of 6. Double it, add 12, halve it, then take away 6. What number do you get?
13. 13.9 × 9 = ?1 — what is the missing digit?
14. 14.1 + 2 + 3 + … + 34 =
15. 15.9 × 6 = 5? — what is the missing digit?
16. 16.?03 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.896? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
18. 18.Magic square (every row, column and diagonal has the same total): 10 25 22 | ? 19 7 | 16 13 28. What is the missing number?
19. 19.5?47 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.1 + 2 + 3 + … + 81 =
21. 21.Magic trick! Think of 20. Double it, add 18, halve it, then take away 20. What number do you get?
22. 22.Magic square (every row, column and diagonal has the same total): ? 23 13 | 19 15 11 | 17 7 21. What is the missing number?
23. 23.1234 × 8 + 4 =
24. 24.What comes next? 16, 25, 36, 49, ? (a) 66 (b) 65 (c) 64 (d) 62
25. 25.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.The 5th of a month is a Wednesday. What day is the 25th of the same month? (a) Monday (b) Tuesday (c) Friday (d) Wednesday
27. 27.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.1 + 3 + 5 + … + 17 =
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
30. 30.52 × 4 =
31. 31.20 × 4 =
32. 32.8 × 9 =
33. 33.9 × 3 = 2? — what is the missing digit?
34. 34.40 × 4 =
35. 35.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹19. How many ₹2 coins do you have?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.If today is Monday, what day was it 31 days ago? (a) Saturday (b) Monday (c) Friday (d) Thursday
38. 38.411 × 10 =
39. 39.Take 33 and take away the sum of its digits. What do you get?
40. 40.48 × 4 =

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