Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 376 · 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? 25, 36, 49, 64, ? (a) 79 (b) 82 (c) 83 (d) 81
2. 2.9 × 5 =
3. 3.Magic square (every row, column and diagonal has the same total): 18 20 ? | 8 16 24 | 22 12 14. What is the missing number?
4. 4.If today is Monday, what day was it 17 days ago? (a) Saturday (b) Monday (c) Friday (d) Thursday
5. 5.Magic square (every row, column and diagonal has the same total): 13 12 17 | 18 14 10 | ? 16 15. What is the missing number?
6. 6.1 + 2 + 3 + … + 21 =
7. 7.I thought of a number, multiplied it by 4 and added 2. I got 62. What was my number?
8. 8.99 × ? = 990
9. 9.693 + 396 =
10. 10.Magic square (every row, column and diagonal has the same total): 21 6 27 | 24 18 12 | ? 30 15. What is the missing number?
11. 11.9 × 2 = 1? — what is the missing digit?
12. 12.26 × 100 =
13. 13.11111 × 11111 =
14. 14.24 × 100 =
15. 15.Double 53 =
16. 16.Magic square (every row, column and diagonal has the same total): 27 12 33 | 30 ? 18 | 15 36 21. What is the missing number?
17. 17.Double 93 =
18. 18.396 + 693 =
19. 19.9 × 3 = ?7 — what is the missing digit?
20. 20.Double 63 =
21. 21.I thought of a number, multiplied it by 3 and added 9. I got 18. What was my number?
22. 22.50 × 4 =
23. 23.17 × ? = 17000
24. 24.If today is Sunday, what day was it 22 days ago? (a) Tuesday (b) Saturday (c) Friday (d) Sunday
25. 25.1 × 9 =
26. 26.9 × 4 = 3? — what is the missing digit?
27. 27.2 × 9 =
28. 28.Double 27 =
29. 29.Double 15 =
30. 30.1 + 2 + 3 + … + 9 =
31. 31.If today is Thursday, what day was it 23 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
32. 32.37 × 9 =
33. 33.49 × 1000 =
34. 34.A piggy bank has 12 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
35. 35.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 38 (c) 34 (d) 37
36. 36.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.111111 × 111111 =
38. 38.Magic square (every row, column and diagonal has the same total): 9 23 13 | 19 ? 11 | 17 7 21. What is the missing number?
39. 39.Do the 1089 trick with 945: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?

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