Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 743 · 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.Double 67 =
2. 2.9 × 6 = 5? — what is the missing digit?
3. 3.If today is Sunday, what day will it be after 44 days? (a) Tuesday (b) Friday (c) Wednesday (d) Monday
4. 4.12 × 8 + 2 =
5. 5.12345679 × 72 =
6. 6.If today is Thursday, what day will it be after 29 days? (a) Monday (b) Friday (c) Saturday (d) Thursday
7. 7.Magic trick! Think of 18. Double it, add 8, halve it, then take away 18. What number do you get?
8. 8.The ages of two twins add up to 26. How old is each twin?
9. 9.52 × 4 =
10. 10.The ages of two twins add up to 16. How old is each twin?
11. 11.1 + 2 + 3 + … + 58 =
12. 12.123 × 8 + 3 =
13. 13.Odd one out: which number is NOT in the 6 times table? (a) 21 (b) 24 (c) 12 (d) 42
14. 14.36 × 4 =
15. 15.If today is Wednesday, what day will it be after 74 days? (a) Monday (b) Wednesday (c) Sunday (d) Saturday
16. 16.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.10 × 9 =
18. 18.1 + 3 + 5 + … + 29 =
19. 19.?710 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.Magic square (every row, column and diagonal has the same total): 15 ? 27 | 30 18 6 | 9 24 21. What is the missing number?
21. 21.Take 57 and take away the sum of its digits. What do you get?
22. 22.1 + 2 + 3 + … + 77 =
23. 23.1 + 2 + 3 + … + 46 =
24. 24.37 × 4 =
25. 25.If today is Friday, what day will it be after 19 days? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
26. 26.55 × 4 =
27. 27.409 × ? = 4090
28. 28.5 × 9 =
29. 29.1 + 3 + 5 + … + 37 =
30. 30.The 1st of a month is a Tuesday. What day is the 25th of the same month? (a) Saturday (b) Friday (c) Thursday (d) Monday
31. 31.9 × 4 =
32. 32.Magic trick! Think of 13. Double it, add 10, halve it, then take away 13. What number do you get?
33. 33.9 × 8 = 7? — what is the missing digit?
34. 34.Magic trick! Think of 10. Double it, add 18, halve it, then take away 10. What number do you get?
35. 35.The 8th of a month is a Thursday. What day is the 19th of the same month? (a) Sunday (b) Monday (c) Tuesday (d) Thursday
36. 36.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 98 (c) 102 (d) 100
37. 37.The ages of two twins add up to 12. How old is each twin?
38. 38.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 65 (c) 64 (d) 66
39. 39.1 + 2 + 3 + … + 36 =
40. 40.1 + 2 + 3 + … + 73 =

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