Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 485 · 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 507 + 123 = 623 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 91 × 93 = 8463 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 814 + 880 = 1694 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 452 + 993 = 1445 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 256 + 794 = 1052 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 42 × 48 = 2016 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 32 × 44 = 1400 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 492 + 324 = 816 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 375 + 564 = 939 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 21 × 67 = 1407 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 14 × 32 = 451 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 79 × 78 = 6162 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 64 × 31 = 1984 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 20 × 30 = 600 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 627 + 982 = 1609 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 25 × 27 = 675 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 459 + 660 = 1119 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 36 × 35 = 1255 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 31 × 98 = 3030 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 885 + 907 = 1787 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 475 + 660 = 1135 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 63 × 30 = 1890 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 843 + 371 = 1212 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 41 × 29 = 1189 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 457 + 991 = 1448 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 339 + 603 = 942 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 34 × 65 = 2212 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 28 × 82 = 2305 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 33 × 77 = 2541 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 99 × 21 = 2079 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 964 + 585 = 1548 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 854 + 389 = 1243 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 499 + 848 = 1347 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 51 × 37 = 1887 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 708 + 670 = 1378 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 62 × 29 = 1805 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 37 × 77 = 2854 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 752 + 763 = 1523 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 640 + 807 = 1448 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 29 × 47 = 1363 right or wrong? (a) Wrong (b) Right

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