Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 320 · 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 72 × 29 = 2079 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 31 × 26 = 806 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 34 × 24 = 811 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 221 + 249 = 475 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 655 + 122 = 768 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 580 + 982 = 1567 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 820 + 176 = 996 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 866 + 338 = 1204 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 745 + 272 = 1018 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 89 × 58 = 5162 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 23 × 94 = 2162 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 49 × 44 = 2156 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 80 × 34 = 2720 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 15 × 14 = 204 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 91 × 49 = 4460 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 363 + 605 = 963 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 62 × 93 = 5772 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 502 + 163 = 672 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 80 × 88 = 7047 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 64 × 76 = 4864 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 64 × 19 = 1216 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 189 + 752 = 941 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 256 + 338 = 594 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 632 + 982 = 1617 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 917 + 972 = 1890 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 317 + 801 = 1118 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 98 × 43 = 4214 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 800 + 936 = 1736 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 24 × 23 = 552 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 39 × 66 = 2571 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 30 × 63 = 1891 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 13 × 69 = 897 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 82 × 35 = 2870 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 927 + 315 = 1242 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 47 × 64 = 3008 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 399 + 414 = 813 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 45 × 65 = 2925 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 48 × 59 = 2832 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 67 × 58 = 3886 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 796 + 321 = 1117 right or wrong? (a) Wrong (b) Right

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