Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 479 · 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 51 × 44 = 2244 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 28 × 33 = 923 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 28 × 98 = 2744 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 216 + 805 = 1012 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 361 + 244 = 605 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 34 × 66 = 2244 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 64 × 57 = 3648 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 73 × 15 = 1097 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 56 × 48 = 2688 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 457 + 929 = 1395 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 455 + 781 = 1236 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 17 × 55 = 938 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 52 × 91 = 4733 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 37 × 44 = 1628 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 34 × 19 = 646 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 88 × 29 = 2552 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 705 + 461 = 1166 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 58 × 74 = 4299 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 211 + 138 = 349 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 248 + 393 = 647 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 909 + 190 = 1101 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 553 + 282 = 827 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 322 + 468 = 790 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 13 × 46 = 598 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 970 + 423 = 1385 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 32 × 97 = 3104 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 40 × 74 = 2960 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 46 × 82 = 3779 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 56 × 77 = 4314 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 28 × 96 = 2688 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 457 + 136 = 590 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 70 × 87 = 6090 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 71 × 91 = 6453 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 594 + 603 = 1197 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 91 × 70 = 6377 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 43 × 50 = 2141 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 41 × 18 = 738 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 18 × 25 = 455 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 609 + 276 = 876 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 28 × 72 = 2017 right or wrong? (a) Wrong (b) Right

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