Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 863 · 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 68 × 82 = 5574 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 22 × 84 = 1855 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 23 × 75 = 1725 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 814 + 158 = 972 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 27 × 83 = 2241 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 188 + 428 = 609 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 19 × 20 = 380 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 427 + 468 = 895 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 953 + 293 = 1246 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 14 × 55 = 770 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 23 × 30 = 686 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 685 + 157 = 841 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 263 + 515 = 787 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 26 × 65 = 1692 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 15 × 85 = 1275 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 273 + 759 = 1031 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 596 + 240 = 836 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 135 + 921 = 1056 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 95 × 27 = 2565 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 380 + 901 = 1281 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 77 × 86 = 6622 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 35 × 15 = 525 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 20 × 84 = 1680 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 63 × 20 = 1260 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 837 + 302 = 1138 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 388 + 952 = 1340 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 56 × 92 = 5158 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 297 + 671 = 968 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 440 + 768 = 1208 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 18 × 33 = 597 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 95 × 12 = 1140 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 694 + 282 = 979 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 84 × 76 = 6384 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 91 × 91 = 8281 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 237 + 373 = 607 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 91 × 78 = 7098 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 52 × 99 = 5148 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 90 × 50 = 4507 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 31 × 47 = 1463 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 36 × 28 = 1016 right or wrong? (a) Wrong (b) Right

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