Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 391 · 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 525 + 742 = 1267 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 28 × 12 = 343 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 295 + 405 = 700 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 832 + 787 = 1616 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 63 × 81 = 5098 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 13 × 92 = 1205 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 883 + 128 = 1013 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 858 + 441 = 1299 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 20 × 21 = 420 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 33 × 25 = 824 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 981 + 356 = 1344 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 453 + 380 = 825 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 440 + 734 = 1167 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 16 × 90 = 1440 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 18 × 46 = 828 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 450 + 810 = 1260 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 55 × 39 = 2142 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 392 + 974 = 1366 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 47 × 52 = 2444 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 55 × 37 = 2035 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 976 + 535 = 1511 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 18 × 49 = 882 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 99 × 62 = 6138 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 67 × 23 = 1540 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 64 × 16 = 1024 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 57 × 41 = 2338 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 18 × 48 = 866 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 553 + 143 = 689 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 711 + 465 = 1180 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 15 × 48 = 720 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 750 + 393 = 1136 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 45 × 42 = 1889 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 852 + 685 = 1537 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 48 × 60 = 2880 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 329 + 253 = 582 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 70 × 23 = 1610 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 51 × 54 = 2754 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 429 + 436 = 865 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 397 + 415 = 812 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 278 + 105 = 383 right or wrong? (a) Wrong (b) Right

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