Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 535 · 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.The ages of two twins add up to 10. How old is each twin?
2. 2.32 × 4 =
3. 3.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
4. 4.If today is Thursday, what day will it be after 15 days? (a) Friday (b) Saturday (c) Monday (d) Thursday
5. 5.1 + 2 + 3 + … + 77 =
6. 6.1 + 2 + 3 + … + 16 =
7. 7.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.What comes next? 3, 6, 9, 12, ? (a) 15 (b) 16 (c) 12 (d) 18
9. 9.Magic square (every row, column and diagonal has the same total): ? 16 6 | 4 12 20 | 18 8 10. What is the missing number?
10. 10.1 + 2 + 3 + … + 55 =
11. 11.9 × 6 =
12. 12.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 81 (c) 83 (d) 82
13. 13.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.9 × 5 = ?5 — what is the missing digit?
15. 15.1 + 2 + 3 + … + 59 =
16. 16.9 × 4 =
17. 17.5?17 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
18. 18.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 27 (c) 25 (d) 26
19. 19.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.123 × 9 + 4 =
21. 21.1 + 3 + 5 + … + 45 =
22. 22.Magic square (every row, column and diagonal has the same total): 18 21 6 | 3 ? 27 | 24 9 12. What is the missing number?
23. 23.6 × 9 =
24. 24.Double 92 =
25. 25.9 × 5 =
26. 26.1 + 2 + 3 + … + 80 =
27. 27.A father is 30 years old and his son is 4. How old was the father when the son was born?
28. 28.468 × 10 =
29. 29.12345679 × 54 =
30. 30.23 × 4 =
31. 31.Take 97 and take away the sum of its digits. What do you get?
32. 32.9 × 4 = ?6 — what is the missing digit?
33. 33.In 4 years a boy will be 16 years old. How old was he 2 years ago?
34. 34.The 6th of a month is a Wednesday. What day is the 19th of the same month? (a) Tuesday (b) Wednesday (c) Friday (d) Monday
35. 35.Half of 74 =
36. 36.13 × 100 =
37. 37.Double 33 =
38. 38.1234 × 8 + 4 =
39. 39.Magic square (every row, column and diagonal has the same total): ? 6 8 | 2 10 18 | 12 14 4. What is the missing number?
40. 40.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?

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