Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 488 · 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.A girl is 8 years old and her brother is 5 years older. How old will her brother be in 6 years?
2. 2.What comes next? 1, 4, 7, 10, ? (a) 16 (b) 13 (c) 14 (d) 10
3. 3.Double 72 =
4. 4.If today is Monday, what day will it be after 33 days? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
5. 5.31 × 4 =
6. 6.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 38 (c) 37 (d) 34
7. 7.?50 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.If today is Sunday, what day will it be after 57 days? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
9. 9.If today is Thursday, what day was it 31 days ago? (a) Monday (b) Sunday (c) Tuesday (d) Thursday
10. 10.Think of 7. Multiply it by 3, then add 8. What number do you end with?
11. 11.Magic square (every row, column and diagonal has the same total): 12 22 8 | 10 14 18 | 20 6 ?. What is the missing number?
12. 12.11 × 11 =
13. 13.If today is Saturday, what day will it be after 87 days? (a) Monday (b) Friday (c) Wednesday (d) Tuesday
14. 14.The 4th of a month is a Tuesday. What day is the 26th of the same month? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
15. 15.37 × 4 =
16. 16.The ages of two twins add up to 30. How old is each twin?
17. 17.Magic trick! Think of 20. Double it, add 10, halve it, then take away 20. What number do you get?
18. 18.16 × 4 =
19. 19.1 + 3 + 5 + … + 25 =
20. 20.Double 62 =
21. 21.Magic square (every row, column and diagonal has the same total): 20 35 14 | 17 23 29 | 32 11 ?. What is the missing number?
22. 22.69?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
23. 23.6 × 9 =
24. 24.22 × ? = 22000
25. 25.9 × 2 =
26. 26.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.9 × 9 =
29. 29.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
30. 30.Magic square (every row, column and diagonal has the same total): 15 8 13 | 10 ? 14 | 11 16 9. What is the missing number?
31. 31.12345679 × 45 =
32. 32.9 × 5 = 4? — what is the missing digit?
33. 33.9 × 10 = ?0 — what is the missing digit?
34. 34.9 × 1 =
35. 35.1 + 3 + 5 + … + 37 =
36. 36.Take 71 and take away the sum of its digits. What do you get?
37. 37.The 9th of a month is a Saturday. What day is the 17th of the same month? (a) Sunday (b) Monday (c) Wednesday (d) Saturday
38. 38.111111 × 111111 =
39. 39.123456789 × 8 + 9 =
40. 40.If today is Wednesday, what day was it 53 days ago? (a) Friday (b) Sunday (c) Tuesday (d) Saturday

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