Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 763 · 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 15 × 46 = 690 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 197 + 486 = 683 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 16 × 88 = 1412 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 57 × 13 = 741 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 116 + 646 = 762 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 553 + 123 = 676 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 62 × 62 = 3839 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 402 + 165 = 567 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 343 + 429 = 772 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 123 + 612 = 735 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 389 + 621 = 1004 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 153 + 537 = 690 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 507 + 179 = 681 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 87 × 42 = 3646 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 67 × 74 = 4958 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 749 + 443 = 1192 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 508 + 451 = 959 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 92 × 23 = 2116 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 29 × 14 = 411 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 41 × 73 = 2987 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 67 × 38 = 2546 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 862 + 977 = 1839 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 629 + 449 = 1078 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 735 + 345 = 1080 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 873 + 234 = 1107 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 73 × 57 = 4161 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 68 × 37 = 2519 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 185 + 889 = 1077 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 15 × 51 = 756 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 56 × 96 = 5376 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 948 + 519 = 1458 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 168 + 450 = 621 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 72 × 16 = 1147 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 43 × 44 = 1892 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 46 × 30 = 1371 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 33 × 99 = 3267 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 75 × 65 = 4875 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 891 + 810 = 1692 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 64 × 45 = 2879 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 87 × 14 = 1226 right or wrong? (a) Wrong (b) Right

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