Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 401 · 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 67 × 71 = 4757 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 630 + 960 = 1590 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 480 + 180 = 660 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 87 × 81 = 7054 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 300 + 110 = 412 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 89 × 59 = 5251 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 752 + 830 = 1582 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 211 + 729 = 940 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 497 + 572 = 1069 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 143 + 723 = 866 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 193 + 599 = 792 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 884 + 363 = 1247 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 996 + 726 = 1722 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 41 × 56 = 2296 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 333 + 187 = 516 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 316 + 576 = 889 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 21 × 31 = 651 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 901 + 366 = 1266 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 453 + 942 = 1388 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 704 + 363 = 1058 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 26 × 53 = 1378 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 679 + 955 = 1634 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 659 + 136 = 795 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 43 × 62 = 2666 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 98 × 50 = 4900 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 888 + 279 = 1166 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 71 × 41 = 2911 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 896 + 837 = 1741 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 16 × 25 = 392 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 98 × 95 = 9310 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 13 × 57 = 741 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 72 × 23 = 1658 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 55 × 21 = 1155 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 267 + 363 = 630 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 20 × 76 = 1516 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 12 × 35 = 422 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 997 + 501 = 1498 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 726 + 324 = 1050 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 395 + 815 = 1210 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 92 × 67 = 6164 right or wrong? (a) Wrong (b) Right

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