Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 130 · 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 622 + 525 = 1155 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 24 × 29 = 694 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 95 × 96 = 9120 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 486 + 677 = 1161 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 82 × 54 = 4428 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 139 + 932 = 1065 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 94 × 41 = 3855 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 43 × 58 = 2493 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 455 + 576 = 1031 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 737 + 749 = 1488 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 52 × 68 = 3533 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 439 + 245 = 684 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 946 + 267 = 1213 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 26 × 84 = 2181 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 907 + 886 = 1785 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 21 × 61 = 1281 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 876 + 462 = 1338 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 133 + 582 = 708 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 636 + 590 = 1226 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 887 + 715 = 1601 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 391 + 148 = 539 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 107 + 241 = 348 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 507 + 661 = 1160 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 288 + 723 = 1004 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 181 + 765 = 946 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 66 × 79 = 5214 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 546 + 847 = 1393 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 85 × 56 = 4763 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 64 × 48 = 3068 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 94 × 21 = 1978 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 21 × 43 = 903 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 109 + 122 = 231 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 51 × 45 = 2297 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 83 × 58 = 4814 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 48 × 45 = 2159 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 54 × 59 = 3186 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 47 × 85 = 3995 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 644 + 493 = 1137 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 53 × 68 = 3604 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 450 + 549 = 1001 right or wrong? (a) Right (b) Wrong

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