Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 171 · 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.If today is Monday, what day was it 57 days ago? (a) Wednesday (b) Monday (c) Saturday (d) Sunday
2. 2.406 × 10 =
3. 3.12345679 × 63 =
4. 4.12 × 9 + 3 =
5. 5.10 × 9 =
6. 6.41 × 100 =
7. 7.37 × 3 =
8. 8.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
9. 9.698 × ? = 6980
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.If today is Friday, what day was it 51 days ago? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
12. 12.Take 68 and take away the sum of its digits. What do you get?
13. 13.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
14. 14.Magic square (every row, column and diagonal has the same total): 12 5 10 | 7 9 ? | 8 13 6. What is the missing number?
15. 15.43 × 100 =
16. 16.9 × 4 = 3? — what is the missing digit?
17. 17.What comes next? 13, 18, 23, 28, ? (a) 28 (b) 33 (c) 38 (d) 34
18. 18.92 × ? = 920
19. 19.9 × 9 =
20. 20.594 + 495 =
21. 21.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 98 (c) 102 (d) 100
22. 22.12345679 × 81 =
23. 23.Double 41 =
24. 24.If today is Thursday, what day will it be after 11 days? (a) Sunday (b) Thursday (c) Monday (d) Tuesday
25. 25.I thought of a number, added 1 and then doubled it. I got 12. What was my number?
26. 26.44 × ? = 4400
27. 27.15 × ? = 1500
28. 28.Magic square (every row, column and diagonal has the same total): 14 29 8 | ? 17 23 | 26 5 20. What is the missing number?
29. 29.Double 24 =
30. 30.If today is Monday, what day was it 47 days ago? (a) Thursday (b) Wednesday (c) Tuesday (d) Saturday
31. 31.2?13 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.17 × 4 =
33. 33.237? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
34. 34.Take 57 and take away the sum of its digits. What do you get?
35. 35.The ages of two twins add up to 20. How old is each twin?
36. 36.Magic square (every row, column and diagonal has the same total): 21 23 13 | 11 ? 27 | 25 15 17. What is the missing number?
37. 37.1 + 2 + 3 + … + 53 =
38. 38.Half of 34 =
39. 39.6?85 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
40. 40.47 × 4 =

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