Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 204 · 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 × 4 = 3? — what is the missing digit?
2. 2.602 × ? = 6020
3. 3.Double 29 =
4. 4.If today is Friday, what day was it 27 days ago? (a) Sunday (b) Tuesday (c) Saturday (d) Friday
5. 5.47 × 4 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.If today is Tuesday, what day will it be after 20 days? (a) Monday (b) Thursday (c) Sunday (d) Tuesday
8. 8.11 × 11 =
9. 9.A girl is 6 years old and her brother is 5 years older. How old will her brother be in 2 years?
10. 10.The 9th of a month is a Tuesday. What day is the 28th of the same month? (a) Saturday (b) Wednesday (c) Sunday (d) Monday
11. 11.12345679 × 9 =
12. 12.Magic square (every row, column and diagonal has the same total): 25 10 13 | 4 16 28 | ? 22 7. What is the missing number?
13. 13.Take 14 and take away the sum of its digits. What do you get?
14. 14.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 42 (c) 36 (d) 48
15. 15.495 + 594 =
16. 16.Double 57 =
17. 17.1 + 2 + 3 + … + 94 =
18. 18.Think of 14. Multiply it by 5, then add 3. What number do you end with?
19. 19.In 2 years a boy will be 12 years old. How old was he 4 years ago?
20. 20.12 × 4 =
21. 21.594 + 495 =
22. 22.693 + 396 =
23. 23.1 + 2 + 3 + … + 97 =
24. 24.5 × 9 =
25. 25.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 64 (c) 48 (d) 65
26. 26.If today is Monday, what day was it 43 days ago? (a) Wednesday (b) Sunday (c) Saturday (d) Monday
27. 27.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 82 (c) 81 (d) 83
28. 28.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
29. 29.1 × 9 =
30. 30.Magic square (every row, column and diagonal has the same total): 15 12 ? | 30 18 6 | 9 24 21. What is the missing number?
31. 31.I thought of a number, added 7 and then doubled it. I got 48. What was my number?
32. 32.If today is Saturday, what day was it 34 days ago? (a) Saturday (b) Wednesday (c) Monday (d) Sunday
33. 33.9 × 9 = 8? — what is the missing digit?
34. 34.45 × 4 =
35. 35.The 9th of a month is a Sunday. What day is the 21st of the same month? (a) Monday (b) Thursday (c) Saturday (d) Friday
36. 36.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 49 (c) 51 (d) 47
37. 37.37 × 12 =
38. 38.43 × 1000 =
39. 39.Magic square (every row, column and diagonal has the same total): ? 11 13 | 7 15 23 | 17 19 9. What is the missing number?
40. 40.?163 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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