Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 794 · 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 Thursday, what day was it 34 days ago? (a) Thursday (b) Saturday (c) Friday (d) Monday
2. 2.Take 55 and take away the sum of its digits. What do you get?
3. 3.32?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.55 × 100 =
5. 5.A father is 30 years old and his son is 11. How old was the father when the son was born?
6. 6.1 + 2 + 3 + … + 34 =
7. 7.1 + 3 + 5 + … + 13 =
8. 8.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Half of 88 =
10. 10.123456 × 8 + 6 =
11. 11.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.11 × 4 =
13. 13.9 × 3 = 2? — what is the missing digit?
14. 14.?04 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
16. 16.The 2nd of a month is a Friday. What day is the 14th of the same month? (a) Wednesday (b) Saturday (c) Thursday (d) Tuesday
17. 17.2 × 9 =
18. 18.Magic square (every row, column and diagonal has the same total): 7 2 9 | 8 ? 4 | 3 10 5. What is the missing number?
19. 19.Double 53 =
20. 20.9 × 6 =
21. 21.20 × 4 =
22. 22.A father is 41 years old and his son is 9. How old was the father when the son was born?
23. 23.A father is 41 years old and his son is 12. How old was the father when the son was born?
24. 24.9 × 9 = ?1 — what is the missing digit?
25. 25.Magic square (every row, column and diagonal has the same total): 15 30 9 | 12 18 24 | ? 6 21. What is the missing number?
26. 26.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
27. 27.Magic square (every row, column and diagonal has the same total): 19 21 ? | 9 17 25 | 23 13 15. What is the missing number?
28. 28.12345679 × 54 =
29. 29.579? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
30. 30.297 + 792 =
31. 31.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.2 × ? = 2000
33. 33.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 25 (c) 23 (d) 26
34. 34.Magic square (every row, column and diagonal has the same total): 10 17 12 | 15 13 11 | 14 ? 16. What is the missing number?
35. 35.Magic square (every row, column and diagonal has the same total): ? 9 14 | 11 13 15 | 12 17 10. What is the missing number?
36. 36.If today is Tuesday, what day will it be after 67 days? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
37. 37.27 × 4 =
38. 38.9 × 9 = 8? — what is the missing digit?
39. 39.3 × 9 =
40. 40.Think of 13. Multiply it by 3, then add 4. What number do you end with?

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