Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 906 · 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. 1.1 + 2 + 3 + … + 67 =
2. 2.9 × 3 = ?7 — what is the missing digit?
3. 3.A piggy bank has 10 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
4. 4.Half of 36 =
5. 5.1 + 2 + 3 + … + 61 =
6. 6.12345678 × 8 + 8 =
7. 7.23 × 100 =
8. 8.6 × 4 =
9. 9.Magic square (every row, column and diagonal has the same total): 6 7 2 | 1 5 ? | 8 3 4. What is the missing number?
10. 10.9 × 8 =
11. 11.98 × 100 =
12. 12.13 × 4 =
13. 13.17 × 4 =
14. 14.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 27 (c) 25 (d) 26
16. 16.Double 16 =
17. 17.60 × 4 =
18. 18.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.80? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.Half of 66 =
21. 21.A father is 44 years old and his son is 5. How old was the father when the son was born?
22. 22.If today is Tuesday, what day was it 17 days ago? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
23. 23.26 × 4 =
24. 24.Magic trick! Think of 6. Double it, add 4, halve it, then take away 6. What number do you get?
25. 25.9 × 5 = 4? — what is the missing digit?
26. 26.What comes next? 18, 21, 24, 27, ? (a) 27 (b) 30 (c) 33 (d) 31
27. 27.The 5th of a month is a Wednesday. What day is the 14th of the same month? (a) Monday (b) Saturday (c) Friday (d) Thursday
28. 28.5 × 9 =
29. 29.10 × 9 =
30. 30.11111 × 11111 =
31. 31.9 × 8 = 7? — what is the missing digit?
32. 32.1 + 2 + 3 + … + 51 =
33. 33.7 × 9 =
34. 34.30 × 4 =
35. 35.Magic square (every row, column and diagonal has the same total): 13 15 ? | 3 11 19 | 17 7 9. What is the missing number?
36. 36.I thought of a number, added 2 and then doubled it. I got 24. What was my number?
37. 37.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Double 57 =
39. 39.If today is Tuesday, what day will it be after 27 days? (a) Sunday (b) Thursday (c) Monday (d) Tuesday
40. 40.Magic square (every row, column and diagonal has the same total): 16 31 10 | ? 19 25 | 28 7 22. What is the missing number?

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