Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 27 · 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.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
2. 2.10 × 4 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.35 × 1000 =
5. 5.27 × 1000 =
6. 6.54 × 4 =
7. 7.Double 67 =
8. 8.9 × 2 =
9. 9.Double 16 =
10. 10.The 1st of a month is a Saturday. What day is the 27th of the same month? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
11. 11.Magic square (every row, column and diagonal has the same total): 27 12 33 | 30 24 18 | ? 36 21. What is the missing number?
12. 12.132 × 10 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.19 × ? = 19000
15. 15.Think of 3. Multiply it by 2, then add 6. What number do you end with?
16. 16.What comes next? 10, 13, 16, 19, ? (a) 25 (b) 22 (c) 23 (d) 19
17. 17.Half of 148 =
18. 18.Take 22 and take away the sum of its digits. What do you get?
19. 19.Take 54 and take away the sum of its digits. What do you get?
20. 20.28 × 4 =
21. 21.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹21. How many ₹2 coins do you have?
22. 22.Odd one out: which number is NOT in the 4 times table? (a) 32 (b) 28 (c) 16 (d) 9
23. 23.45 × 100 =
24. 24.12345679 × 27 =
25. 25.9 × 10 = ?0 — what is the missing digit?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 23 (c) 25 (d) 26
28. 28.?613 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
29. 29.If today is Wednesday, what day was it 13 days ago? (a) Friday (b) Wednesday (c) Sunday (d) Thursday
30. 30.Magic square (every row, column and diagonal has the same total): 9 30 15 | 24 18 12 | ? 6 27. What is the missing number?
31. 31.34 × 100 =
32. 32.37 × 27 =
33. 33.12345679 × 9 =
34. 34.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 9 years?
35. 35.9 × 2 = ?8 — what is the missing digit?
36. 36.If today is Monday, what day will it be after 9 days? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
37. 37.3?28 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.The 1st of a month is a Thursday. What day is the 21st of the same month? (a) Tuesday (b) Thursday (c) Saturday (d) Wednesday
39. 39.1 + 2 + 3 + … + 99 =
40. 40.9 × 9 =

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