Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 202 · 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 × 2 = ?8 — what is the missing digit?
2. 2.If today is Tuesday, what day was it 42 days ago? (a) Wednesday (b) Friday (c) Monday (d) Tuesday
3. 3.1 + 2 + 3 + … + 13 =
4. 4.If today is Sunday, what day will it be after 59 days? (a) Thursday (b) Saturday (c) Tuesday (d) Wednesday
5. 5.242 × 10 =
6. 6.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 65 (c) 66 (d) 64
7. 7.A piggy bank has 12 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
8. 8.1234 × 8 + 4 =
9. 9.Magic square (every row, column and diagonal has the same total): 19 5 15 | 9 13 17 | 11 21 ?. What is the missing number?
10. 10.495 + 594 =
11. 11.Magic square (every row, column and diagonal has the same total): 6 11 4 | 5 7 ? | 10 3 8. What is the missing number?
12. 12.12345679 × 54 =
13. 13.Magic square (every row, column and diagonal has the same total): ? 7 12 | 9 11 13 | 10 15 8. What is the missing number?
14. 14.Magic square (every row, column and diagonal has the same total): ? 5 20 | 11 17 23 | 14 29 8. What is the missing number?
15. 15.45 × 4 =
16. 16.1 + 3 + 5 + … + 33 =
17. 17.1 + 3 + 5 + … + 27 =
18. 18.9 × 1000 =
19. 19.1 + 2 + 3 + … + 97 =
20. 20.11111 × 11111 =
21. 21.Magic square (every row, column and diagonal has the same total): 10 ? 22 | 31 19 7 | 16 13 28. What is the missing number?
22. 22.Odd one out: which number is NOT in the 5 times table? (a) 31 (b) 25 (c) 20 (d) 15
23. 23.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 42 (c) 49 (d) 36
24. 24.Do the 1089 trick with 705: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 48 and take away the sum of its digits. What do you get?
26. 26.Half of 182 =
27. 27.Take 17 and take away the sum of its digits. What do you get?
28. 28.40 × 4 =
29. 29.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.55 × 4 =
31. 31.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.26 × 4 =
33. 33.Magic square (every row, column and diagonal has the same total): 6 27 12 | 21 ? 9 | 18 3 24. What is the missing number?
34. 34.7 × 9 =
35. 35.85 × 100 =
36. 36.Magic trick! Think of 7. Double it, add 18, halve it, then take away 7. What number do you get?
37. 37.1 + 2 + 3 + … + 48 =
38. 38.Magic square (every row, column and diagonal has the same total): 7 17 15 | ? 13 5 | 11 9 19. What is the missing number?
39. 39.289 × 10 =
40. 40.1234 × 9 + 5 =

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