Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 623 · 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 35 × 40 = 1401 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 936 + 747 = 1683 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 179 + 666 = 845 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 186 + 218 = 404 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 51 × 78 = 3975 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 734 + 443 = 1177 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 87 × 73 = 6348 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 304 + 303 = 607 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 231 + 347 = 580 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 57 × 21 = 1204 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 89 × 16 = 1424 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 95 × 77 = 7312 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 72 × 77 = 5544 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 22 × 84 = 1848 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 528 + 479 = 1007 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 634 + 234 = 868 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 798 + 487 = 1284 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 664 + 813 = 1475 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 84 × 93 = 7811 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 45 × 50 = 2241 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 35 × 31 = 1081 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 438 + 444 = 882 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 89 × 71 = 6319 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 662 + 667 = 1329 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 129 + 307 = 436 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 14 × 57 = 798 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 12 × 67 = 804 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 539 + 219 = 758 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 19 × 85 = 1615 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 73 × 12 = 876 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 27 × 38 = 1026 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 486 + 364 = 850 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 589 + 779 = 1368 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 595 + 774 = 1378 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 499 + 359 = 853 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 52 × 33 = 1712 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 828 + 610 = 1438 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 75 × 83 = 6224 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 426 + 883 = 1309 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 26 × 66 = 1716 right or wrong? (a) Right (b) Wrong

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