Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 681 · 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 28 × 65 = 1812 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 73 × 38 = 2774 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 752 + 804 = 1547 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 49 × 78 = 3822 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 480 + 113 = 593 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 499 + 268 = 767 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 966 + 249 = 1215 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 15 × 76 = 1132 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 620 + 320 = 940 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 558 + 880 = 1435 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 798 + 823 = 1613 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 90 × 52 = 4684 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 201 + 745 = 940 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 33 × 14 = 462 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 453 + 345 = 796 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 99 × 44 = 4356 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 773 + 155 = 931 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 23 × 60 = 1380 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 17 × 22 = 380 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 588 + 126 = 714 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 58 × 94 = 5454 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 718 + 282 = 1004 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 64 × 52 = 3328 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 24 × 48 = 1152 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 581 + 465 = 1046 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 28 × 13 = 364 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 172 + 788 = 959 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 92 × 61 = 5612 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 49 × 34 = 1675 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 743 + 592 = 1335 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 694 + 183 = 873 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 460 + 512 = 972 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 870 + 484 = 1354 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 887 + 391 = 1278 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 78 × 74 = 5772 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 991 + 228 = 1219 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 752 + 609 = 1354 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 82 × 73 = 5992 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 78 × 45 = 3510 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 410 + 237 = 652 right or wrong? (a) Wrong (b) Right

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