Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 295 · 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? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 42 (d) 49
2. 2.If today is Friday, what day will it be after 51 days? (a) Sunday (b) Monday (c) Saturday (d) Wednesday
3. 3.If today is Sunday, what day was it 49 days ago? (a) Wednesday (b) Sunday (c) Monday (d) Saturday
4. 4.9 × 8 = 7? — what is the missing digit?
5. 5.What comes next? 15, 24, 33, 42, ? (a) 42 (b) 51 (c) 60 (d) 52
6. 6.37 × 3 =
7. 7.A piggy bank has 11 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
8. 8.9 × 8 = ?2 — what is the missing digit?
9. 9.9 × 4 =
10. 10.Half of 78 =
11. 11.?403 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
12. 12.9 × 9 =
13. 13.Magic square (every row, column and diagonal has the same total): ? 6 11 | 8 10 12 | 9 14 7. What is the missing number?
14. 14.12345679 × 36 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Magic square (every row, column and diagonal has the same total): 12 9 24 | 27 15 3 | ? 21 18. What is the missing number?
17. 17.40 × 4 =
18. 18.Double 18 =
19. 19.Magic square (every row, column and diagonal has the same total): 24 10 20 | ? 18 22 | 16 26 12. What is the missing number?
20. 20.A piggy bank has 10 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
21. 21.1 + 3 + 5 + … + 49 =
22. 22.12345679 × 27 =
23. 23.9 × 10 = ?0 — what is the missing digit?
24. 24.A father is 36 years old and his son is 9. How old was the father when the son was born?
25. 25.Half of 52 =
26. 26.1 + 2 + 3 + … + 16 =
27. 27.39 × 4 =
28. 28.123456 × 8 + 6 =
29. 29.Magic square (every row, column and diagonal has the same total): 6 20 10 | 16 12 8 | ? 4 18. What is the missing number?
30. 30.648 × 10 =
31. 31.12345 × 8 + 5 =
32. 32.Magic square (every row, column and diagonal has the same total): 4 3 8 | 9 5 1 | 2 7 ?. What is the missing number?
33. 33.9 × 2 =
34. 34.Magic square (every row, column and diagonal has the same total): 21 11 13 | 7 ? 23 | 17 19 9. What is the missing number?
35. 35.If today is Tuesday, what day will it be after 30 days? (a) Friday (b) Wednesday (c) Thursday (d) Sunday
36. 36.9 × 2 = 1? — what is the missing digit?
37. 37.The 2nd of a month is a Saturday. What day is the 12th of the same month? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
38. 38.1 + 3 + 5 + … + 27 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
40. 40.1 + 3 + 5 + … + 21 =

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