Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 635 · 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. 1.111111 × 111111 =
2. 2.573? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.Magic trick! Think of 8. Double it, add 4, halve it, then take away 8. What number do you get?
4. 4.28 × 100 =
5. 5.Think of 8. Multiply it by 5, then add 3. What number do you end with?
6. 6.If today is Wednesday, what day was it 41 days ago? (a) Thursday (b) Wednesday (c) Sunday (d) Friday
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.What comes next? 9, 16, 25, 36, ? (a) 51 (b) 50 (c) 47 (d) 49
9. 9.In 5 years a boy will be 16 years old. How old was he 4 years ago?
10. 10.Magic square (every row, column and diagonal has the same total): ? 11 12 | 9 13 17 | 14 15 10. What is the missing number?
11. 11.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
12. 12.1 + 2 + 3 + … + 25 =
13. 13.In 4 years a boy will be 17 years old. How old was he 2 years ago?
14. 14.Magic square (every row, column and diagonal has the same total): 8 13 ? | 7 9 11 | 12 5 10. What is the missing number?
15. 15.37 × 21 =
16. 16.The 9th of a month is a Monday. What day is the 17th of the same month? (a) Wednesday (b) Monday (c) Friday (d) Tuesday
17. 17.1 + 2 + 3 + … + 26 =
18. 18.979 × ? = 9790
19. 19.9 × 1 =
20. 20.17 × 4 =
21. 21.Magic square (every row, column and diagonal has the same total): 30 9 ? | 15 21 27 | 18 33 12. What is the missing number?
22. 22.594 + 495 =
23. 23.528 × ? = 5280
24. 24.A girl is 11 years old and her brother is 3 years older. How old will her brother be in 8 years?
25. 25.9 × 6 = ?4 — what is the missing digit?
26. 26.Magic square (every row, column and diagonal has the same total): ? 12 7 | 10 8 6 | 9 4 11. What is the missing number?
27. 27.3 × 9 =
28. 28.What comes next? 5, 10, 20, 40, ? (a) 80 (b) 60 (c) 81 (d) 70
29. 29.9 × 8 = ?2 — what is the missing digit?
30. 30.91 × 100 =
31. 31.9 × 10 = ?0 — what is the missing digit?
32. 32.16 × 4 =
33. 33.56 × 4 =
34. 34.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.If today is Wednesday, what day will it be after 36 days? (a) Friday (b) Wednesday (c) Thursday (d) Sunday
36. 36.9 × 10 = 9? — what is the missing digit?
37. 37.10 × 1000 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
39. 39.A father is 45 years old and his son is 5. How old was the father when the son was born?
40. 40.33 × 4 =

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