Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 955 · 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 337 + 780 = 1117 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 63 × 42 = 2646 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 93 × 28 = 2605 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 87 × 68 = 5916 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 223 + 491 = 716 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 127 + 644 = 772 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 771 + 420 = 1185 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 55 × 58 = 3190 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 84 × 45 = 3780 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 26 × 18 = 468 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 80 × 42 = 3360 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 690 + 214 = 904 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 828 + 967 = 1789 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 41 × 82 = 3368 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 17 × 25 = 425 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 79 × 38 = 3002 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 385 + 748 = 1133 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 81 × 60 = 4860 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 807 + 345 = 1152 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 70 × 35 = 2450 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 489 + 126 = 617 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 144 + 859 = 995 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 250 + 285 = 528 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 550 + 810 = 1360 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 593 + 245 = 838 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 39 × 75 = 2916 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 67 × 19 = 1277 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 541 + 331 = 872 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 998 + 862 = 1860 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 539 + 323 = 862 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 797 + 801 = 1600 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 68 × 45 = 3060 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 430 + 414 = 849 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 40 × 81 = 3243 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 113 + 797 = 913 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 726 + 742 = 1471 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 713 + 187 = 900 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 61 × 73 = 4453 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 429 + 650 = 1084 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 72 × 89 = 6402 right or wrong? (a) Right (b) Wrong

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