Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 181 · 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. 1.9 × 6 = ?4 — what is the missing digit?
2. 2.?356 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.Half of 172 =
4. 4.43 × 4 =
5. 5.Magic trick! Think of 6. Double it, add 6, halve it, then take away 6. What number do you get?
6. 6.57 × 100 =
7. 7.1 + 3 + 5 + … + 29 =
8. 8.28 × 100 =
9. 9.37 × 27 =
10. 10.Take 42 and take away the sum of its digits. What do you get?
11. 11.Magic trick! Think of 4. Double it, add 12, halve it, then take away 4. What number do you get?
12. 12.46 × 4 =
13. 13.Magic trick! Think of 20. Double it, add 4, halve it, then take away 20. What number do you get?
14. 14.Odd one out: which number is NOT in the 9 times table? (a) 81 (b) 71 (c) 54 (d) 27
15. 15.75 × 100 =
16. 16.?94 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.9 × 6 = 5? — what is the missing digit?
18. 18.9 × 9 = ?1 — what is the missing digit?
19. 19.If today is Friday, what day will it be after 53 days? (a) Tuesday (b) Wednesday (c) Monday (d) Friday
20. 20.6 × 9 =
21. 21.9 × 9 =
22. 22.Double 16 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.21 × 4 =
25. 25.Half of 34 =
26. 26.A piggy bank has 10 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
27. 27.The 5th of a month is a Tuesday. What day is the 27th of the same month? (a) Wednesday (b) Thursday (c) Tuesday (d) Saturday
28. 28.Magic square (every row, column and diagonal has the same total): 13 10 25 | 28 16 4 | 7 ? 19. What is the missing number?
29. 29.39 × 4 =
30. 30.Half of 188 =
31. 31.The 6th of a month is a Wednesday. What day is the 18th of the same month? (a) Sunday (b) Monday (c) Thursday (d) Tuesday
32. 32.If today is Sunday, what day was it 18 days ago? (a) Wednesday (b) Saturday (c) Thursday (d) Tuesday
33. 33.243? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
34. 34.A father is 30 years old and his son is 4. How old was the father when the son was born?
35. 35.Half of 56 =
36. 36.Think of 2. Multiply it by 2, then add 9. What number do you end with?
37. 37.What comes next? 5, 11, 17, 23, ? (a) 35 (b) 30 (c) 29 (d) 23
38. 38.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 48 (c) 65 (d) 56
39. 39.57 × 4 =
40. 40.102 × 10 =

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