Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 663 · 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. 1.24 × 4 =
2. 2.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
3. 3.Magic trick! Think of 6. Double it, add 10, halve it, then take away 6. What number do you get?
4. 4.33 × ? = 33000
5. 5.9 × 7 =
6. 6.Double 94 =
7. 7.Magic trick! Think of 4. Double it, add 14, halve it, then take away 4. What number do you get?
8. 8.1 + 2 + 3 + … + 32 =
9. 9.11111 × 11111 =
10. 10.Magic square (every row, column and diagonal has the same total): 9 ? 13 | 14 10 6 | 7 12 11. What is the missing number?
11. 11.What comes next? 6, 12, 18, 24, ? (a) 24 (b) 31 (c) 36 (d) 30
12. 12.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 12 (c) 16 (d) 17
13. 13.21?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.7 × 9 =
15. 15.25 × 4 =
16. 16.6?22 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.Magic square (every row, column and diagonal has the same total): ? 8 22 | 20 16 12 | 10 24 14. What is the missing number?
18. 18.If today is Wednesday, what day will it be after 29 days? (a) Sunday (b) Wednesday (c) Thursday (d) Friday
19. 19.594 + 495 =
20. 20.Magic square (every row, column and diagonal has the same total): 5 15 13 | ? 11 3 | 9 7 17. What is the missing number?
21. 21.Think of 2. Multiply it by 2, then add 4. What number do you end with?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 42 (c) 49 (d) 48
24. 24.Magic square (every row, column and diagonal has the same total): 7 8 3 | 2 6 10 | 9 4 ?. What is the missing number?
25. 25.12345679 × 81 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.9 × 5 = ?5 — what is the missing digit?
28. 28.10 × 100 =
29. 29.9 × 6 = ?4 — what is the missing digit?
30. 30.40 × 4 =
31. 31.A father is 33 years old and his son is 11. How old was the father when the son was born?
32. 32.Odd one out: which number is NOT in the 9 times table? (a) 18 (b) 27 (c) 32 (d) 36
33. 33.9 × 4 = ?6 — what is the missing digit?
34. 34.1 + 3 + 5 + … + 23 =
35. 35.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.9 × 10 =
37. 37.Magic trick! Think of 10. Double it, add 18, halve it, then take away 10. What number do you get?
38. 38.39 × 1000 =
39. 39.25 × 1000 =
40. 40.11 × ? = 11000

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