Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 22 · 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 33 × 13 = 429 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 33 × 23 = 751 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 385 + 211 = 603 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 476 + 586 = 1057 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 39 × 17 = 663 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 53 × 89 = 4723 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 96 × 74 = 7103 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 495 + 697 = 1190 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 36 × 38 = 1368 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 237 + 744 = 981 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 853 + 320 = 1171 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 64 × 21 = 1341 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 569 + 484 = 1060 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 30 × 62 = 1866 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 743 + 696 = 1445 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 194 + 714 = 908 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 89 × 40 = 3556 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 24 × 21 = 495 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 144 + 223 = 367 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 35 × 50 = 1759 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 539 + 612 = 1158 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 79 × 27 = 2142 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 97 × 50 = 4851 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 52 × 33 = 1716 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 19 × 71 = 1341 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 150 + 276 = 422 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 139 + 981 = 1117 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 66 × 16 = 1059 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 77 × 67 = 5159 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 49 × 96 = 4698 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 800 + 965 = 1774 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 18 × 16 = 290 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 903 + 595 = 1498 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 22 × 50 = 1100 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 31 × 16 = 496 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 70 × 91 = 6370 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 94 × 32 = 3000 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 924 + 142 = 1068 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 281 + 127 = 401 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 69 × 87 = 6003 right or wrong? (a) Right (b) Wrong

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