Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 538 · 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 209 + 595 = 804 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 562 + 487 = 1052 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 12 × 55 = 660 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 94 × 25 = 2350 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 49 × 66 = 3239 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 28 × 39 = 1092 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 85 × 28 = 2387 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 797 + 981 = 1770 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 96 × 79 = 7576 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 23 × 72 = 1663 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 78 × 30 = 2342 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 817 + 199 = 1016 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 438 + 141 = 580 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 141 + 945 = 1086 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 77 × 71 = 5467 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 412 + 470 = 885 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 22 × 59 = 1298 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 64 × 12 = 768 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 15 × 40 = 600 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 66 × 59 = 3894 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 111 + 639 = 750 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 205 + 219 = 421 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 206 + 107 = 319 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 74 × 59 = 4366 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 21 × 87 = 1827 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 53 × 82 = 4340 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 365 + 408 = 772 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 32 × 16 = 512 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 65 × 55 = 3575 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 75 × 91 = 6829 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 613 + 685 = 1298 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 72 × 96 = 6912 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 139 + 609 = 748 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 83 × 73 = 6059 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 79 × 25 = 1975 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 446 + 522 = 968 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 81 × 87 = 7055 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 652 + 675 = 1327 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 557 + 959 = 1514 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 437 + 651 = 1090 right or wrong? (a) Wrong (b) Right

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