Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 634 · 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. 1.123 × 8 + 3 =
2. 2.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
3. 3.The 5th of a month is a Tuesday. What day is the 19th of the same month? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
4. 4.9 × 4 = ?6 — what is the missing digit?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.9 × 5 = ?5 — what is the missing digit?
7. 7.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.27 × 4 =
9. 9.Magic square (every row, column and diagonal has the same total): ? 27 6 | 9 15 21 | 24 3 18. What is the missing number?
10. 10.47 × 1000 =
11. 11.60 × 4 =
12. 12.30 × 4 =
13. 13.594 + 495 =
14. 14.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.If today is Monday, what day will it be after 15 days? (a) Tuesday (b) Monday (c) Wednesday (d) Friday
16. 16.12345679 × 36 =
17. 17.I thought of a number, multiplied it by 4 and added 3. I got 47. What was my number?
18. 18.9 × 9 = ?1 — what is the missing digit?
19. 19.97 × ? = 9700
20. 20.53 × 4 =
21. 21.If today is Wednesday, what day was it 29 days ago? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
22. 22.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.16 × 4 =
24. 24.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 81 (c) 60 (d) 80
25. 25.495 + 594 =
26. 26.784 × 10 =
27. 27.12 × 4 =
28. 28.25 × 4 =
29. 29.1 + 2 + 3 + … + 88 =
30. 30.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.177 × 10 =
32. 32.Magic square (every row, column and diagonal has the same total): 25 ? 31 | 28 22 16 | 13 34 19. What is the missing number?
33. 33.A piggy bank has 4 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
34. 34.Odd one out: which number is NOT in the 3 times table? (a) 12 (b) 16 (c) 18 (d) 21
35. 35.The ages of two twins add up to 22. How old is each twin?
36. 36.9 × 3 = ?7 — what is the missing digit?
37. 37.Magic trick! Think of 2. Double it, add 6, halve it, then take away 2. What number do you get?
38. 38.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.309 × ? = 3090
40. 40.Magic trick! Think of 18. Double it, add 6, halve it, then take away 18. What number do you get?

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