Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 453 · 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.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.If today is Monday, what day will it be after 66 days? (a) Thursday (b) Sunday (c) Friday (d) Wednesday
3. 3.57 × 4 =
4. 4.12? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
5. 5.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
6. 6.1 + 2 + 3 + … + 58 =
7. 7.61?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.12345678 × 9 + 9 =
9. 9.1 + 2 + 3 + … + 60 =
10. 10.12345679 × 18 =
11. 11.Take 42 and take away the sum of its digits. What do you get?
12. 12.9 × 4 = ?6 — what is the missing digit?
13. 13.1 + 2 + 3 + … + 98 =
14. 14.Half of 162 =
15. 15.6 × 9 =
16. 16.What comes next? 18, 27, 36, 45, ? (a) 54 (b) 45 (c) 55 (d) 63
17. 17.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.9 × 9 = 8? — what is the missing digit?
19. 19.Magic trick! Think of 13. Double it, add 14, halve it, then take away 13. What number do you get?
20. 20.Magic square (every row, column and diagonal has the same total): 18 3 ? | 21 15 9 | 6 27 12. What is the missing number?
21. 21.86 × 100 =
22. 22.Half of 58 =
23. 23.49 × 4 =
24. 24.1 + 3 + 5 + … + 21 =
25. 25.Magic square (every row, column and diagonal has the same total): 9 ? 7 | 4 6 8 | 5 10 3. What is the missing number?
26. 26.Odd one out: which number is NOT in the 6 times table? (a) 42 (b) 24 (c) 19 (d) 30
27. 27.9 × 5 = ?5 — what is the missing digit?
28. 28.19 × 4 =
29. 29.4 × 9 =
30. 30.37 × 18 =
31. 31.1234 × 8 + 4 =
32. 32.9 × 1 =
33. 33.A father is 44 years old and his son is 13. How old was the father when the son was born?
34. 34.12345679 × 9 =
35. 35.891 + 198 =
36. 36.1 + 3 + 5 + … + 41 =
37. 37.23 × 4 =
38. 38.1 + 3 + 5 + … + 27 =
39. 39.18 × 10 =
40. 40.16 × 4 =

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