Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 82 · 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 788 + 864 = 1652 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 278 + 850 = 1128 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 105 + 832 = 945 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 212 + 613 = 816 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 91 × 76 = 6913 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 44 × 73 = 3213 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 890 + 290 = 1174 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 966 + 124 = 1098 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 732 + 694 = 1426 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 40 × 48 = 1920 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 54 × 20 = 1080 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 51 × 81 = 4135 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 781 + 496 = 1277 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 61 × 69 = 4206 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 364 + 619 = 983 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 17 × 42 = 719 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 92 × 87 = 8004 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 329 + 264 = 593 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 95 × 80 = 7600 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 32 × 80 = 2560 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 705 + 743 = 1452 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 44 × 76 = 3339 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 35 × 74 = 2584 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 42 × 83 = 3486 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 158 + 494 = 655 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 38 × 87 = 3306 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 848 + 266 = 1114 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 468 + 186 = 654 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 218 + 837 = 1057 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 99 × 87 = 8620 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 368 + 976 = 1344 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 335 + 589 = 924 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 13 × 26 = 344 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 137 + 146 = 277 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 34 × 62 = 2108 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 448 + 264 = 712 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 915 + 811 = 1726 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 32 × 83 = 2654 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 44 × 63 = 2773 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 799 + 297 = 1096 right or wrong? (a) Right (b) Wrong

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