Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 519 · 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 62 × 82 = 5075 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 490 + 504 = 994 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 37 × 14 = 518 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 399 + 836 = 1230 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 68 × 53 = 3604 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 869 + 602 = 1475 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 69 × 86 = 5934 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 15 × 32 = 480 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 627 + 493 = 1118 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 87 × 53 = 4611 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 42 × 35 = 1475 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 38 × 85 = 3225 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 594 + 191 = 791 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 934 + 770 = 1709 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 849 + 745 = 1593 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 583 + 333 = 921 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 83 × 88 = 7304 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 82 × 89 = 7302 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 83 × 66 = 5486 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 72 × 60 = 4314 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 148 + 470 = 624 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 90 × 57 = 5134 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 404 + 916 = 1320 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 17 × 91 = 1547 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 135 + 798 = 933 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 477 + 144 = 626 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 527 + 798 = 1325 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 56 × 98 = 5482 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 98 × 26 = 2541 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 88 × 78 = 6862 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 914 + 216 = 1130 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 946 + 658 = 1604 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 80 × 49 = 3920 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 18 × 29 = 522 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 948 + 147 = 1095 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 82 × 38 = 3116 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 296 + 506 = 803 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 81 × 31 = 2512 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 17 × 95 = 1615 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 385 + 351 = 733 right or wrong? (a) Wrong (b) Right

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