Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 309 · 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. 1.48 × 100 =
2. 2.Half of 52 =
3. 3.Magic trick! Think of 20. Double it, add 10, halve it, then take away 20. What number do you get?
4. 4.Half of 124 =
5. 5.9 × 4 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.If today is Friday, what day was it 17 days ago? (a) Wednesday (b) Friday (c) Monday (d) Tuesday
8. 8.7 × 4 =
9. 9.792 × ? = 7920
10. 10.A piggy bank has 6 coins of ₹5 and 7 coins of ₹2. How many rupees are in it?
11. 11.I thought of a number, multiplied it by 2 and added 6. I got 28. What was my number?
12. 12.The 3rd of a month is a Friday. What day is the 27th of the same month? (a) Monday (b) Tuesday (c) Sunday (d) Thursday
13. 13.?63 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.What comes next? 4, 8, 16, 32, ? (a) 65 (b) 48 (c) 64 (d) 56
15. 15.Double 41 =
16. 16.9 × 6 =
17. 17.57 × 4 =
18. 18.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.If today is Thursday, what day will it be after 26 days? (a) Monday (b) Wednesday (c) Friday (d) Tuesday
20. 20.38 × 1000 =
21. 21.The 3rd of a month is a Sunday. What day is the 16th of the same month? (a) Friday (b) Tuesday (c) Sunday (d) Saturday
22. 22.12345679 × 81 =
23. 23.9 × 3 = ?7 — what is the missing digit?
24. 24.Magic square (every row, column and diagonal has the same total): ? 8 3 | 2 6 10 | 9 4 5. What is the missing number?
25. 25.Magic trick! Think of 9. Double it, add 6, halve it, then take away 9. What number do you get?
26. 26.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
27. 27.Odd one out: which number is NOT in the 9 times table? (a) 36 (b) 63 (c) 34 (d) 54
28. 28.9 × 9 = ?1 — what is the missing digit?
29. 29.Half of 102 =
30. 30.If today is Friday, what day was it 9 days ago? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
31. 31.I thought of a number, multiplied it by 5 and added 2. I got 37. What was my number?
32. 32.55 × 4 =
33. 33.Half of 92 =
34. 34.10 × 4 =
35. 35.The 2nd of a month is a Wednesday. What day is the 21st of the same month? (a) Tuesday (b) Thursday (c) Sunday (d) Monday
36. 36.Magic square (every row, column and diagonal has the same total): 4 11 ? | 9 7 5 | 8 3 10. What is the missing number?
37. 37.45 × 4 =
38. 38.1 + 2 + 3 + … + 8 =
39. 39.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 23 (c) 27 (d) 25
40. 40.12345678 × 8 + 8 =

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