Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 419 · 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 28 × 46 = 1288 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 713 + 347 = 1057 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 43 × 67 = 2881 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 75 × 28 = 2100 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 43 × 98 = 4214 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 29 × 84 = 2436 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 32 × 40 = 1286 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 15 × 94 = 1410 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 68 × 83 = 5648 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 296 + 219 = 515 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 597 + 176 = 780 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 64 × 25 = 1598 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 849 + 986 = 1835 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 21 × 12 = 252 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 121 + 674 = 795 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 97 × 67 = 6490 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 911 + 204 = 1115 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 85 × 23 = 1955 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 96 × 64 = 6151 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 39 × 18 = 702 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 84 × 60 = 5040 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 974 + 482 = 1454 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 281 + 827 = 1108 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 17 × 36 = 612 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 456 + 515 = 971 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 68 × 21 = 1436 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 947 + 950 = 1897 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 38 × 83 = 3145 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 168 + 314 = 481 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 959 + 387 = 1337 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 27 × 26 = 700 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 181 + 857 = 1038 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 94 × 34 = 3196 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 48 × 95 = 4560 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 158 + 534 = 698 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 356 + 354 = 710 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 38 × 53 = 2014 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 911 + 283 = 1194 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 39 × 37 = 1443 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 185 + 251 = 436 right or wrong? (a) Right (b) Wrong

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