Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 874 · 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. 1.9 × 3 = ?7 — what is the missing digit?
2. 2.13 × 4 =
3. 3.1 + 2 + 3 + … + 20 =
4. 4.The ages of two twins add up to 8. How old is each twin?
5. 5.?611 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
6. 6.53 × 4 =
7. 7.Take 498. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.What comes next? 7, 9, 11, 13, ? (a) 16 (b) 15 (c) 13 (d) 17
9. 9.18 × 4 =
10. 10.5?07 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.693 + 396 =
12. 12.1 + 2 + 3 + … + 45 =
13. 13.9 × 9 =
14. 14.Magic square (every row, column and diagonal has the same total): 5 15 13 | ? 11 3 | 9 7 17. What is the missing number?
15. 15.If today is Wednesday, what day will it be after 68 days? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
16. 16.7 × 9 =
17. 17.50 × ? = 50000
18. 18.9 × 6 = ?4 — what is the missing digit?
19. 19.Take 753. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.585 × 10 =
21. 21.Magic square (every row, column and diagonal has the same total): 19 ? 23 | 21 17 13 | 11 25 15. What is the missing number?
22. 22.35?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
23. 23.1 + 2 + 3 + … + 23 =
24. 24.342? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
25. 25.Double 58 =
26. 26.Magic trick! Think of 6. Double it, add 18, halve it, then take away 6. What number do you get?
27. 27.3 × 9 =
28. 28.Odd one out: which number is NOT in the 4 times table? (a) 20 (b) 8 (c) 25 (d) 16
29. 29.1 + 2 + 3 + … + 7 =
30. 30.The 4th of a month is a Sunday. What day is the 27th of the same month? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
31. 31.792 + 297 =
32. 32.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.What comes next? 17, 26, 35, 44, ? (a) 62 (b) 44 (c) 53 (d) 54
34. 34.37 × 18 =
35. 35.Do the 1089 trick with 457: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.5 × 9 =
37. 37.59 × 4 =
38. 38.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 64 and take away the sum of its digits. What do you get?
40. 40.What comes next? 25, 36, 49, 64, ? (a) 83 (b) 81 (c) 82 (d) 79

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