Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 662 · 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. 1.21 × 4 =
2. 2.What comes next? 14, 20, 26, 32, ? (a) 32 (b) 44 (c) 38 (d) 39
3. 3.?85 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.30 × 1000 =
5. 5.Magic square (every row, column and diagonal has the same total): 6 11 ? | 13 9 5 | 8 7 12. What is the missing number?
6. 6.The 4th of a month is a Saturday. What day is the 28th of the same month? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
7. 7.The 5th of a month is a Sunday. What day is the 14th of the same month? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
8. 8.23 × 4 =
9. 9.In 2 years a boy will be 14 years old. How old was he 4 years ago?
10. 10.1 + 2 + 3 + … + 16 =
11. 11.90 × ? = 9000
12. 12.Half of 174 =
13. 13.12345678 × 8 + 8 =
14. 14.18?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.Half of 68 =
16. 16.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 2 years?
17. 17.A girl is 7 years old and her brother is 3 years older. How old will her brother be in 6 years?
18. 18.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
19. 19.12345679 × 54 =
20. 20.9 × 3 = 2? — what is the missing digit?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.I thought of a number, multiplied it by 3 and added 5. I got 17. What was my number?
23. 23.1 + 2 + 3 + … + 12 =
24. 24.32 × 4 =
25. 25.14 × 4 =
26. 26.42 × 4 =
27. 27.52 × 4 =
28. 28.46 × 4 =
29. 29.63 × 100 =
30. 30.24 × 1000 =
31. 31.If today is Tuesday, what day will it be after 65 days? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
32. 32.37 × 3 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.In 3 years a boy will be 11 years old. How old was he 5 years ago?
35. 35.349? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
36. 36.Odd one out: which number is NOT in the 6 times table? (a) 48 (b) 42 (c) 24 (d) 49
37. 37.9 × 6 = ?4 — what is the missing digit?
38. 38.I thought of a number, added 7 and then doubled it. I got 50. What was my number?
39. 39.What comes next? 4, 10, 16, 22, ? (a) 22 (b) 28 (c) 34 (d) 29
40. 40.If today is Tuesday, what day was it 42 days ago? (a) Monday (b) Friday (c) Wednesday (d) Tuesday

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