Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 219 · 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 507 + 552 = 1064 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 879 + 452 = 1331 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 12 × 24 = 288 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 54 × 91 = 4913 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 990 + 591 = 1581 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 77 × 39 = 3003 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 45 × 14 = 624 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 940 + 768 = 1708 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 531 + 135 = 664 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 903 + 819 = 1722 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 466 + 553 = 1018 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 17 × 70 = 1189 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 270 + 269 = 539 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 50 × 90 = 4491 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 19 × 24 = 456 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 16 × 92 = 1466 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 86 × 77 = 6629 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 66 × 88 = 5808 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 92 × 63 = 5787 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 46 × 78 = 3586 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 139 + 930 = 1069 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 29 × 21 = 611 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 963 + 337 = 1307 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 440 + 469 = 918 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 73 × 78 = 5694 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 43 × 16 = 688 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 82 × 42 = 3442 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 25 × 39 = 967 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 876 + 960 = 1844 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 903 + 752 = 1658 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 66 × 27 = 1782 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 45 × 41 = 1845 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 14 × 99 = 1386 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 212 + 181 = 393 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 17 × 94 = 1606 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 95 × 72 = 6840 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 67 × 80 = 5360 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 52 × 37 = 1924 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 30 × 20 = 600 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 86 × 14 = 1198 right or wrong? (a) Wrong (b) Right

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