Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 2 · 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 68 × 88 = 5978 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 71 × 17 = 1200 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 581 + 463 = 1044 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 22 × 59 = 1298 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 872 + 866 = 1738 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 796 + 966 = 1762 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 75 × 99 = 7425 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 469 + 209 = 678 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 99 × 84 = 8322 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 34 × 76 = 2584 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 34 × 80 = 2722 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 38 × 83 = 3154 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 970 + 882 = 1852 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 252 + 449 = 699 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 183 + 299 = 482 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 27 × 25 = 684 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 86 × 61 = 5244 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 917 + 180 = 1102 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 89 × 68 = 6052 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 92 × 81 = 7455 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 81 × 63 = 5096 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 25 × 83 = 2082 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 29 × 14 = 411 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 16 × 17 = 272 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 13 × 87 = 1132 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 45 × 73 = 3278 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 97 × 76 = 7372 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 50 × 16 = 800 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 240 + 578 = 822 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 29 × 71 = 2059 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 57 × 62 = 3534 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 62 × 42 = 2604 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 68 × 33 = 2239 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 540 + 752 = 1292 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 112 + 916 = 1024 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 218 + 226 = 436 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 274 + 127 = 401 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 35 × 82 = 2867 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 96 × 35 = 3360 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 190 + 179 = 369 right or wrong? (a) Wrong (b) Right

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