Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 950 · 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 719 + 862 = 1574 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 37 × 25 = 920 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 50 × 52 = 2600 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 32 × 32 = 1024 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 193 + 210 = 403 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 604 + 200 = 804 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 487 + 150 = 637 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 246 + 680 = 926 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 83 × 13 = 1079 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 69 × 19 = 1315 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 39 × 30 = 1162 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 665 + 975 = 1641 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 72 × 89 = 6408 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 81 × 60 = 4860 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 20 × 71 = 1420 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 876 + 821 = 1697 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 62 × 88 = 5460 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 39 × 87 = 3393 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 390 + 350 = 734 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 852 + 493 = 1345 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 141 + 306 = 447 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 23 × 24 = 555 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 41 × 58 = 2378 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 855 + 519 = 1376 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 35 × 74 = 2590 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 17 × 97 = 1649 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 691 + 646 = 1337 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 332 + 442 = 774 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 873 + 170 = 1043 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 88 × 31 = 2728 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 30 × 32 = 960 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 41 × 84 = 3451 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 695 + 583 = 1278 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 95 × 19 = 1798 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 63 × 74 = 4666 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 24 × 20 = 476 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 693 + 722 = 1413 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 139 + 366 = 508 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 847 + 548 = 1395 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 316 + 920 = 1236 right or wrong? (a) Wrong (b) Right

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