Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 359 · 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 63 × 99 = 6238 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 25 × 18 = 456 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 268 + 990 = 1258 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 620 + 410 = 1030 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 48 × 70 = 3366 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 144 + 304 = 452 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 107 + 992 = 1099 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 336 + 137 = 473 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 418 + 918 = 1336 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 24 × 41 = 984 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 198 + 977 = 1175 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 263 + 667 = 930 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 218 + 234 = 446 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 751 + 284 = 1029 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 364 + 825 = 1189 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 339 + 946 = 1285 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 92 × 12 = 1101 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 71 × 29 = 2053 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 126 + 807 = 933 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 502 + 811 = 1313 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 31 × 72 = 2230 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 199 + 499 = 698 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 442 + 147 = 580 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 37 × 78 = 2895 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 54 × 28 = 1512 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 853 + 534 = 1382 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 21 × 41 = 861 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 39 × 46 = 1790 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 64 × 38 = 2432 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 17 × 36 = 606 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 348 + 412 = 760 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 762 + 724 = 1486 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 58 × 28 = 1624 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 913 + 752 = 1665 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 13 × 49 = 631 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 60 × 94 = 5643 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 606 + 188 = 794 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 51 × 94 = 4794 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 57 × 12 = 684 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 74 × 26 = 1924 right or wrong? (a) Right (b) Wrong

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