Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 985 · 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.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
2. 2.13 × ? = 1300
3. 3.12345679 × 27 =
4. 4.343 × 10 =
5. 5.1 + 2 + 3 + … + 90 =
6. 6.5 × 9 =
7. 7.6 × 9 =
8. 8.10 × 4 =
9. 9.If today is Monday, what day was it 37 days ago? (a) Saturday (b) Tuesday (c) Friday (d) Sunday
10. 10.Think of 10. Multiply it by 3, then add 5. What number do you end with?
11. 11.If today is Saturday, what day will it be after 38 days? (a) Monday (b) Wednesday (c) Friday (d) Tuesday
12. 12.A piggy bank has 11 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
13. 13.9 × 8 = 7? — what is the missing digit?
14. 14.The 3rd of a month is a Tuesday. What day is the 14th of the same month? (a) Sunday (b) Saturday (c) Friday (d) Tuesday
15. 15.9 × 4 =
16. 16.A girl is 12 years old and her brother is 6 years older. How old will her brother be in 5 years?
17. 17.220 × ? = 2200
18. 18.Half of 62 =
19. 19.792 + 297 =
20. 20.I thought of a number, added 1 and then doubled it. I got 18. What was my number?
21. 21.239? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
22. 22.9 × 2 = 1? — what is the missing digit?
23. 23.9 × 1 =
24. 24.Half of 136 =
25. 25.9 × 8 =
26. 26.If today is Tuesday, what day was it 53 days ago? (a) Saturday (b) Thursday (c) Monday (d) Friday
27. 27.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.50 × 4 =
29. 29.43 × 4 =
30. 30.Magic square (every row, column and diagonal has the same total): 22 8 18 | 12 16 20 | 14 ? 10. What is the missing number?
31. 31.Double 13 =
32. 32.Half of 144 =
33. 33.10 × 9 =
34. 34.Magic square (every row, column and diagonal has the same total): 11 4 9 | 6 8 10 | ? 12 5. What is the missing number?
35. 35.123 × 8 + 3 =
36. 36.12345678 × 9 + 9 =
37. 37.28 × 4 =
38. 38.If today is Thursday, what day was it 22 days ago? (a) Wednesday (b) Thursday (c) Tuesday (d) Saturday
39. 39.51 × 100 =
40. 40.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?

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