Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 580 · 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 940 + 160 = 1100 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 13 × 81 = 1053 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 50 × 94 = 4698 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 53 × 62 = 3288 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 624 + 584 = 1200 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 39 × 29 = 1131 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 776 + 421 = 1197 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 72 × 61 = 4392 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 674 + 201 = 875 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 219 + 429 = 649 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 67 × 63 = 4221 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 22 × 31 = 673 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 56 × 20 = 1121 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 965 + 133 = 1098 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 866 + 339 = 1205 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 500 + 359 = 868 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 178 + 987 = 1165 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 171 + 649 = 821 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 374 + 962 = 1337 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 644 + 291 = 937 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 82 × 18 = 1476 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 61 × 46 = 2806 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 437 + 769 = 1207 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 13 × 60 = 773 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 18 × 76 = 1370 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 800 + 662 = 1460 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 66 × 52 = 3440 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 804 + 838 = 1650 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 819 + 119 = 938 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 79 × 34 = 2686 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 12 × 65 = 780 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 65 × 28 = 1820 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 883 + 112 = 995 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 897 + 179 = 1076 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 59 × 24 = 1416 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 39 × 96 = 3738 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 21 × 92 = 1932 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 612 + 824 = 1436 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 81 × 36 = 2925 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 525 + 367 = 892 right or wrong? (a) Wrong (b) Right

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