Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 889 · 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 38 × 27 = 1026 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 49 × 50 = 2450 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 509 + 997 = 1507 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 198 + 793 = 991 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 269 + 471 = 740 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 60 × 75 = 4504 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 790 + 308 = 1102 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 30 × 33 = 990 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 15 × 54 = 818 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 523 + 998 = 1527 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 485 + 520 = 1005 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 687 + 296 = 983 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 976 + 628 = 1596 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 942 + 722 = 1656 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 179 + 686 = 865 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 560 + 999 = 1559 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 178 + 752 = 930 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 421 + 588 = 1009 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 129 + 868 = 997 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 870 + 639 = 1515 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 723 + 167 = 890 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 16 × 46 = 736 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 427 + 439 = 872 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 53 × 19 = 1007 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 57 × 50 = 2850 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 400 + 409 = 809 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 21 × 56 = 1170 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 271 + 612 = 883 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 16 × 25 = 400 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 600 + 772 = 1366 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 44 × 87 = 3828 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 538 + 819 = 1362 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 30 × 89 = 2662 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 336 + 375 = 711 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 28 × 20 = 569 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 72 × 57 = 4104 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 293 + 513 = 813 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 759 + 664 = 1423 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 43 × 65 = 2795 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 71 × 51 = 3621 right or wrong? (a) Wrong (b) Right

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