Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 641 · 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 × 6 = 5? — what is the missing digit?
2. 2.If today is Monday, what day will it be after 58 days? (a) Thursday (b) Saturday (c) Tuesday (d) Wednesday
3. 3.9 × 2 =
4. 4.Double 13 =
5. 5.9 × 4 = 3? — what is the missing digit?
6. 6.In 3 years a boy will be 12 years old. How old was he 5 years ago?
7. 7.What comes next? 14, 16, 18, 20, ? (a) 24 (b) 23 (c) 20 (d) 22
8. 8.79 × 100 =
9. 9.In 2 years a boy will be 11 years old. How old was he 6 years ago?
10. 10.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 23 (c) 25 (d) 26
11. 11.16 × 4 =
12. 12.9 × 9 =
13. 13.9 × 5 = 4? — what is the missing digit?
14. 14.1 + 3 + 5 + … + 23 =
15. 15.7 × 9 =
16. 16.Magic square (every row, column and diagonal has the same total): 17 19 9 | 7 15 23 | 21 ? 13. What is the missing number?
17. 17.9 × 3 =
18. 18.12 × 4 =
19. 19.59 × 4 =
20. 20.47?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
21. 21.1 + 3 + 5 + … + 31 =
22. 22.40 × 4 =
23. 23.792 + 297 =
24. 24.The 8th of a month is a Monday. What day is the 23rd of the same month? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
25. 25.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 37 (c) 36 (d) 34
26. 26.The 8th of a month is a Saturday. What day is the 27th of the same month? (a) Wednesday (b) Thursday (c) Sunday (d) Friday
27. 27.A piggy bank has 4 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
28. 28.9 × 3 = 2? — what is the missing digit?
29. 29.123 × 8 + 3 =
30. 30.Magic square (every row, column and diagonal has the same total): ? 32 11 | 14 20 26 | 29 8 23. What is the missing number?
31. 31.14 × 1000 =
32. 32.Half of 62 =
33. 33.I thought of a number, multiplied it by 5 and added 3. I got 68. What was my number?
34. 34.1 + 2 + 3 + … + 11 =
35. 35.Magic square (every row, column and diagonal has the same total): 6 21 ? | 27 15 3 | 12 9 24. What is the missing number?
36. 36.I thought of a number, added 3 and then doubled it. I got 44. What was my number?
37. 37.95 × 100 =
38. 38.Take 51 and take away the sum of its digits. What do you get?
39. 39.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.9 × 8 = ?2 — what is the missing digit?

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