Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 927 · 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 × 91 = 5824 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 127 + 510 = 646 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 395 + 844 = 1239 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 514 + 464 = 976 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 840 + 345 = 1185 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 795 + 647 = 1442 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 474 + 776 = 1250 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 90 × 76 = 6839 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 85 × 99 = 8415 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 65 × 35 = 2275 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 17 × 20 = 340 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 85 × 17 = 1445 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 28 × 60 = 1682 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 27 × 26 = 702 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 726 + 686 = 1413 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 54 × 83 = 4479 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 904 + 747 = 1651 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 166 + 109 = 275 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 22 × 26 = 572 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 37 × 37 = 1373 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 66 × 28 = 1841 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 70 × 34 = 2380 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 49 × 89 = 4366 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 40 × 63 = 2520 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 65 × 99 = 6429 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 67 × 60 = 4020 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 804 + 934 = 1745 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 513 + 311 = 821 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 48 × 32 = 1540 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 848 + 443 = 1291 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 89 × 30 = 2674 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 961 + 409 = 1370 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 666 + 311 = 977 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 756 + 339 = 1095 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 75 × 79 = 5930 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 961 + 495 = 1456 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 875 + 335 = 1209 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 13 × 57 = 741 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 82 × 32 = 2624 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 541 + 455 = 990 right or wrong? (a) Wrong (b) Right

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