Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 816 · 40 questions

The trick (Last digits only): Multiply (or add) only the last digits of the two numbers. The last digit of that result is the last digit the answer must have. Different last digit → wrong for sure. Same last digit → it passes the check (work it out in full to be certain).

1. 1.Last-digit check: is 96 × 54 = 5184 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 57 × 82 = 4669 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 72 × 92 = 6624 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 852 + 876 = 1728 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 115 + 274 = 389 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 135 + 496 = 626 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 291 + 241 = 532 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 67 × 31 = 2083 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 83 × 63 = 5225 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 433 + 594 = 1027 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 583 + 783 = 1367 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 70 × 45 = 3150 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 226 + 875 = 1101 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 411 + 827 = 1238 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 76 × 61 = 4631 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 729 + 365 = 1089 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 26 × 61 = 1586 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 780 + 158 = 938 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 645 + 268 = 913 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 832 + 957 = 1789 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 507 + 560 = 1067 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 18 × 18 = 324 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 460 + 405 = 865 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 146 + 347 = 493 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 42 × 54 = 2268 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 130 + 119 = 258 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 32 × 70 = 2238 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 618 + 291 = 911 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 84 × 25 = 2100 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 39 × 19 = 742 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 92 × 84 = 7731 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 49 × 22 = 1078 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 242 + 782 = 1033 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 367 + 823 = 1188 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 824 + 543 = 1367 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 355 + 612 = 967 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 987 + 211 = 1198 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 607 + 248 = 855 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 69 × 31 = 2134 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 360 + 753 = 1113 right or wrong? (a) Wrong (b) Right

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks