Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 460 · 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. 1.1 + 3 + 5 + … + 29 =
2. 2.9 × 6 = 5? — what is the missing digit?
3. 3.9 × 8 = 7? — what is the missing digit?
4. 4.55 × 4 =
5. 5.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.I thought of a number, added 2 and then doubled it. I got 18. What was my number?
7. 7.A girl is 8 years old and her brother is 3 years older. How old will her brother be in 6 years?
8. 8.Magic square (every row, column and diagonal has the same total): 15 8 ? | 10 12 14 | 11 16 9. What is the missing number?
9. 9.What comes next? 20, 27, 34, 41, ? (a) 48 (b) 55 (c) 49 (d) 41
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.What comes next? 9, 13, 17, 21, ? (a) 26 (b) 21 (c) 29 (d) 25
12. 12.Double 37 =
13. 13.A girl is 5 years old and her brother is 4 years older. How old will her brother be in 4 years?
14. 14.536? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.?602 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.1 + 2 + 3 + … + 43 =
17. 17.48 × 4 =
18. 18.9 × 3 = 2? — what is the missing digit?
19. 19.1 + 3 + 5 + … + 11 =
20. 20.If today is Wednesday, what day was it 10 days ago? (a) Saturday (b) Monday (c) Sunday (d) Wednesday
21. 21.Double 36 =
22. 22.304 × 10 =
23. 23.Think of 6. Multiply it by 5, then add 5. What number do you end with?
24. 24.Half of 88 =
25. 25.If today is Tuesday, what day will it be after 19 days? (a) Sunday (b) Wednesday (c) Saturday (d) Monday
26. 26.9 × 4 = ?6 — what is the missing digit?
27. 27.Think of 11. Multiply it by 5, then add 2. What number do you end with?
28. 28.1 × 9 =
29. 29.Half of 72 =
30. 30.Take 29 and take away the sum of its digits. What do you get?
31. 31.9 × 2 = ?8 — what is the missing digit?
32. 32.46 × 1000 =
33. 33.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
34. 34.Double 34 =
35. 35.871 × ? = 8710
36. 36.73 × 100 =
37. 37.Think of 13. Multiply it by 5, then add 2. What number do you end with?
38. 38.1 + 2 + 3 + … + 77 =
39. 39.27 × 4 =
40. 40.1234 × 9 + 5 =

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