Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 853 · 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 53 × 51 = 2710 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 139 + 445 = 586 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 700 + 358 = 1058 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 62 × 86 = 5332 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 95 × 14 = 1330 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 569 + 860 = 1437 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 696 + 989 = 1685 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 125 + 454 = 579 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 825 + 687 = 1513 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 172 + 297 = 469 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 52 × 44 = 2290 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 124 + 604 = 728 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 55 × 41 = 2253 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 51 × 94 = 4790 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 386 + 861 = 1254 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 647 + 811 = 1449 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 27 × 85 = 2295 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 67 × 25 = 1678 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 12 × 18 = 216 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 263 + 537 = 800 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 615 + 849 = 1469 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 505 + 231 = 733 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 77 × 92 = 7084 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 183 + 430 = 613 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 333 + 715 = 1040 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 55 × 72 = 3960 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 887 + 909 = 1796 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 12 × 18 = 211 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 99 × 33 = 3266 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 65 × 96 = 6239 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 349 + 154 = 508 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 331 + 355 = 692 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 28 × 69 = 1931 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 302 + 841 = 1144 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 396 + 975 = 1368 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 854 + 763 = 1626 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 35 × 87 = 3050 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 238 + 330 = 568 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 945 + 996 = 1936 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 369 + 601 = 970 right or wrong? (a) Wrong (b) Right

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