Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 621 · 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 30 × 70 = 2100 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 12 × 51 = 610 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 854 + 629 = 1474 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 99 × 95 = 9405 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 76 × 23 = 1753 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 788 + 349 = 1140 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 34 × 21 = 714 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 175 + 138 = 307 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 549 + 909 = 1458 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 148 + 261 = 411 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 56 × 36 = 2016 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 371 + 376 = 747 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 62 × 66 = 4092 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 379 + 356 = 731 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 50 × 86 = 4300 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 26 × 61 = 1592 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 274 + 418 = 692 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 15 × 41 = 610 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 288 + 798 = 1091 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 20 × 96 = 1920 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 29 × 69 = 2010 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 57 × 44 = 2514 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 556 + 842 = 1406 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 199 + 585 = 786 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 66 × 24 = 1584 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 40 × 87 = 3480 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 85 × 27 = 2295 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 116 + 369 = 485 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 43 × 88 = 3790 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 90 × 28 = 2522 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 38 × 28 = 1064 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 74 × 51 = 3774 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 52 × 82 = 4264 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 68 × 81 = 5508 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 62 × 48 = 2976 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 892 + 432 = 1324 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 698 + 231 = 930 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 19 × 25 = 481 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 25 × 28 = 691 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 70 × 13 = 908 right or wrong? (a) Wrong (b) Right

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