Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 802 · 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 57 × 76 = 4335 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 299 + 382 = 675 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 39 × 14 = 546 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 84 × 55 = 4626 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 21 × 56 = 1174 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 215 + 590 = 802 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 97 × 42 = 4074 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 78 × 16 = 1248 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 446 + 275 = 721 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 96 × 24 = 2301 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 196 + 643 = 839 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 27 × 63 = 1708 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 47 × 88 = 4136 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 399 + 457 = 853 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 76 × 27 = 2060 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 167 + 422 = 589 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 83 × 58 = 4814 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 677 + 869 = 1544 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 29 × 50 = 1453 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 30 × 18 = 540 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 124 + 250 = 382 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 471 + 158 = 629 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 71 × 44 = 3124 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 57 × 90 = 5130 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 889 + 772 = 1661 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 78 × 74 = 5772 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 794 + 137 = 931 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 601 + 804 = 1407 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 873 + 390 = 1263 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 561 + 814 = 1376 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 73 × 31 = 2263 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 31 × 92 = 2852 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 16 × 14 = 222 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 26 × 28 = 728 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 94 × 71 = 6674 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 165 + 734 = 893 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 847 + 859 = 1699 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 43 × 96 = 4128 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 228 + 507 = 735 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 84 × 16 = 1344 right or wrong? (a) Right (b) Wrong

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