Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 105 · 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 × 100 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.What comes next? 16, 25, 34, 43, ? (a) 43 (b) 53 (c) 61 (d) 52
4. 4.Magic square (every row, column and diagonal has the same total): 22 8 ? | 12 16 20 | 14 24 10. What is the missing number?
5. 5.52 × 4 =
6. 6.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹17. How many ₹2 coins do you have?
7. 7.Odd one out: which number is NOT in the 6 times table? (a) 24 (b) 32 (c) 30 (d) 36
8. 8.495 + 594 =
9. 9.1 + 2 + 3 + … + 53 =
10. 10.34 × ? = 34000
11. 11.Half of 192 =
12. 12.Magic trick! Think of 15. Double it, add 6, halve it, then take away 15. What number do you get?
13. 13.50?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.Take 40 and take away the sum of its digits. What do you get?
15. 15.20 × 4 =
16. 16.34 × 10 =
17. 17.Think of 10. Multiply it by 3, then add 5. What number do you end with?
18. 18.?00 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
19. 19.What comes next? 3, 9, 15, 21, ? (a) 21 (b) 28 (c) 27 (d) 33
20. 20.11 × 11 =
21. 21.Magic square (every row, column and diagonal has the same total): 17 15 ? | 27 19 11 | 13 23 21. What is the missing number?
22. 22.What comes next? 6, 9, 12, 15, ? (a) 15 (b) 19 (c) 21 (d) 18
23. 23.12345679 × 72 =
24. 24.3 × ? = 3000
25. 25.9 × 8 = ?2 — what is the missing digit?
26. 26.15 × 4 =
27. 27.What comes next? 3, 7, 11, 15, ? (a) 23 (b) 20 (c) 15 (d) 19
28. 28.If today is Monday, what day will it be after 81 days? (a) Friday (b) Monday (c) Saturday (d) Thursday
29. 29.9 × 5 =
30. 30.137? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
31. 31.If today is Thursday, what day will it be after 59 days? (a) Sunday (b) Wednesday (c) Saturday (d) Monday
32. 32.The 2nd of a month is a Monday. What day is the 26th of the same month? (a) Wednesday (b) Thursday (c) Friday (d) Sunday
33. 33.9 × 4 =
34. 34.9 × ? = 9000
35. 35.A girl is 7 years old and her brother is 2 years older. How old will her brother be in 4 years?
36. 36.1 + 2 + 3 + … + 29 =
37. 37.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 56 (c) 65 (d) 48
38. 38.36 × ? = 36000
39. 39.9 × 9 =
40. 40.The ages of two twins add up to 28. How old is each twin?

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