Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 235 · 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? 2, 4, 8, 16, ? (a) 24 (b) 32 (c) 33 (d) 28
2. 2.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.12 × 100 =
4. 4.76 × 100 =
5. 5.Half of 196 =
6. 6.Double 91 =
7. 7.1 + 2 + 3 + … + 51 =
8. 8.Magic square (every row, column and diagonal has the same total): 17 12 13 | 10 14 ? | 15 16 11. What is the missing number?
9. 9.Double 51 =
10. 10.41 × 4 =
11. 11.Half of 32 =
12. 12.A piggy bank has 5 coins of ₹5 and 12 coins of ₹2. How many rupees are in it?
13. 13.What comes next? 4, 8, 16, 32, ? (a) 65 (b) 48 (c) 56 (d) 64
14. 14.56?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.9 × 1 =
16. 16.83 × 100 =
17. 17.Take 45 and take away the sum of its digits. What do you get?
18. 18.Magic square (every row, column and diagonal has the same total): 14 4 18 | 16 12 8 | 6 ? 10. What is the missing number?
19. 19.16 × 1000 =
20. 20.?289 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
21. 21.1 + 2 + 3 + … + 45 =
22. 22.9 × 3 = ?7 — what is the missing digit?
23. 23.Half of 154 =
24. 24.Magic square (every row, column and diagonal has the same total): 18 3 24 | 21 15 ? | 6 27 12. What is the missing number?
25. 25.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 23 (c) 25 (d) 26
26. 26.6?19 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.What comes next? 3, 6, 9, 12, ? (a) 16 (b) 15 (c) 18 (d) 12
28. 28.If today is Wednesday, what day will it be after 42 days? (a) Saturday (b) Tuesday (c) Thursday (d) Wednesday
29. 29.38 × 4 =
30. 30.I thought of a number, added 7 and then doubled it. I got 30. What was my number?
31. 31.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.75 × ? = 7500
33. 33.Magic square (every row, column and diagonal has the same total): 13 28 7 | ? 16 22 | 25 4 19. What is the missing number?
34. 34.12 × 4 =
35. 35.99 × 100 =
36. 36.Magic square (every row, column and diagonal has the same total): ? 20 18 | 24 16 8 | 14 12 22. What is the missing number?
37. 37.58 × 10 =
38. 38.9 × 10 = ?0 — what is the missing digit?
39. 39.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.9 × 6 = 5? — what is the missing digit?

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