Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 60 · 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 25 × 66 = 1650 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 67 × 62 = 4154 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 20 × 46 = 920 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 796 + 424 = 1220 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 951 + 976 = 1921 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 88 × 62 = 5460 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 737 + 839 = 1570 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 86 × 58 = 4997 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 725 + 861 = 1579 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 625 + 394 = 1025 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 265 + 964 = 1225 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 17 × 89 = 1513 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 775 + 938 = 1710 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 34 × 42 = 1433 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 58 × 41 = 2378 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 762 + 756 = 1518 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 388 + 154 = 541 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 312 + 147 = 467 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 652 + 553 = 1205 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 816 + 764 = 1580 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 274 + 708 = 978 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 174 + 456 = 636 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 487 + 649 = 1132 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 74 × 82 = 6068 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 164 + 597 = 753 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 828 + 880 = 1699 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 840 + 616 = 1459 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 71 × 82 = 5817 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 64 × 39 = 2496 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 705 + 635 = 1347 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 844 + 935 = 1778 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 376 + 824 = 1200 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 14 × 34 = 472 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 33 × 66 = 2183 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 206 + 403 = 609 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 15 × 48 = 720 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 31 × 94 = 2906 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 118 + 696 = 819 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 79 × 24 = 1896 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 63 × 40 = 2522 right or wrong? (a) Wrong (b) Right

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