Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 682 · 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.If today is Tuesday, what day will it be after 43 days? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
2. 2.1 + 2 + 3 + … + 31 =
3. 3.46 × 1000 =
4. 4.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 36 (c) 38 (d) 37
5. 5.A girl is 8 years old and her brother is 2 years older. How old will her brother be in 3 years?
6. 6.Odd one out: which number is NOT in the 6 times table? (a) 12 (b) 30 (c) 48 (d) 29
7. 7.12345 × 9 + 6 =
8. 8.Magic square (every row, column and diagonal has the same total): 19 16 31 | 34 22 10 | 13 ? 25. What is the missing number?
9. 9.2 × 100 =
10. 10.4 × 9 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.111 × 111 =
13. 13.32 × ? = 32000
14. 14.9 × 3 = ?7 — what is the missing digit?
15. 15.1 + 3 + 5 + … + 23 =
16. 16.48 × 4 =
17. 17.9 × 9 = ?1 — what is the missing digit?
18. 18.853 × 10 =
19. 19.9 × 9 = 8? — what is the missing digit?
20. 20.9 × 3 = 2? — what is the missing digit?
21. 21.9 × 7 = 6? — what is the missing digit?
22. 22.I thought of a number, multiplied it by 5 and added 7. I got 72. What was my number?
23. 23.1 + 2 + 3 + … + 90 =
24. 24.8 × 4 =
25. 25.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.9 × 10 = ?0 — what is the missing digit?
27. 27.The 9th of a month is a Saturday. What day is the 20th of the same month? (a) Saturday (b) Thursday (c) Tuesday (d) Wednesday
28. 28.1 + 2 + 3 + … + 67 =
29. 29.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
30. 30.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.9 × 2 = ?8 — what is the missing digit?
32. 32.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.1 + 2 + 3 + … + 56 =
34. 34.198 + 891 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.A girl is 9 years old and her brother is 6 years older. How old will her brother be in 2 years?
37. 37.9 × 6 = ?4 — what is the missing digit?
38. 38.9 × 2 = 1? — what is the missing digit?
39. 39.Magic trick! Think of 13. Double it, add 10, halve it, then take away 13. What number do you get?
40. 40.106? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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