Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 306 · 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 64 × 40 = 2560 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 34 × 46 = 1564 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 819 + 268 = 1096 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 31 × 16 = 505 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 280 + 387 = 671 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 854 + 838 = 1692 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 458 + 788 = 1246 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 945 + 223 = 1168 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 76 × 90 = 6840 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 30 × 78 = 2340 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 97 × 86 = 8342 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 47 × 61 = 2872 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 33 × 65 = 2144 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 25 × 95 = 2370 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 65 × 50 = 3243 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 613 + 989 = 1596 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 40 × 44 = 1763 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 30 × 51 = 1523 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 54 × 58 = 3130 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 85 × 64 = 5440 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 45 × 17 = 769 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 717 + 994 = 1709 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 724 + 769 = 1493 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 83 × 20 = 1652 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 97 × 80 = 7760 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 932 + 130 = 1062 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 373 + 393 = 766 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 32 × 35 = 1120 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 60 × 72 = 4312 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 26 × 72 = 1872 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 665 + 217 = 882 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 19 × 50 = 950 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 444 + 689 = 1133 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 810 + 754 = 1561 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 45 × 26 = 1164 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 25 × 58 = 1450 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 20 × 78 = 1560 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 643 + 955 = 1598 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 62 × 63 = 3906 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 58 × 71 = 4123 right or wrong? (a) Wrong (b) Right

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