Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 149 · 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 × 29 = 957 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 42 × 75 = 3150 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 88 × 49 = 4312 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 588 + 519 = 1107 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 15 × 26 = 384 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 15 × 40 = 605 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 326 + 229 = 548 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 14 × 22 = 305 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 40 × 58 = 2320 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 887 + 835 = 1722 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 535 + 817 = 1353 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 430 + 885 = 1306 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 576 + 789 = 1365 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 333 + 536 = 876 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 539 + 290 = 829 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 13 × 33 = 429 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 951 + 452 = 1398 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 163 + 637 = 795 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 775 + 302 = 1079 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 600 + 676 = 1268 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 365 + 549 = 914 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 24 × 12 = 288 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 94 × 35 = 3282 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 577 + 580 = 1148 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 83 × 46 = 3818 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 88 × 89 = 7832 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 57 × 47 = 2680 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 326 + 498 = 816 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 506 + 385 = 891 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 279 + 536 = 815 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 41 × 37 = 1520 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 500 + 931 = 1431 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 28 × 60 = 1680 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 12 × 38 = 458 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 26 × 45 = 1167 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 82 × 32 = 2626 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 31 × 31 = 967 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 307 + 124 = 431 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 927 + 768 = 1695 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 431 + 580 = 1013 right or wrong? (a) Wrong (b) Right

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