Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 432 · 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 64 × 96 = 6144 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 81 × 82 = 6647 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 155 + 477 = 634 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 264 + 385 = 652 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 126 + 752 = 878 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 58 × 73 = 4227 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 16 × 94 = 1513 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 16 × 36 = 576 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 49 × 91 = 4459 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 516 + 762 = 1277 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 18 × 36 = 648 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 70 × 59 = 4130 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 807 + 741 = 1557 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 986 + 348 = 1326 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 263 + 259 = 522 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 917 + 288 = 1205 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 55 × 84 = 4620 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 15 × 47 = 706 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 83 × 71 = 5893 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 80 × 42 = 3356 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 71 × 82 = 5822 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 943 + 145 = 1088 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 53 × 55 = 2908 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 874 + 620 = 1494 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 522 + 316 = 838 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 666 + 351 = 1025 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 20 × 42 = 840 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 50 × 91 = 4550 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 81 × 85 = 6885 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 83 × 33 = 2739 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 55 × 19 = 1043 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 63 × 28 = 1764 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 527 + 324 = 842 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 74 × 19 = 1406 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 906 + 858 = 1771 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 84 × 89 = 7478 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 288 + 968 = 1256 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 42 × 14 = 588 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 837 + 216 = 1053 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 920 + 280 = 1200 right or wrong? (a) Right (b) Wrong

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