Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 545 · 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 61 × 79 = 4816 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 435 + 698 = 1133 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 295 + 774 = 1069 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 943 + 969 = 1909 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 528 + 672 = 1200 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 31 × 81 = 2516 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 879 + 511 = 1390 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 351 + 235 = 586 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 24 × 77 = 1848 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 26 × 32 = 832 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 687 + 906 = 1597 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 350 + 118 = 464 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 973 + 768 = 1741 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 26 × 94 = 2439 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 37 × 30 = 1110 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 916 + 497 = 1413 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 819 + 914 = 1733 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 83 × 29 = 2407 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 382 + 961 = 1336 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 51 × 32 = 1623 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 24 × 56 = 1344 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 76 × 95 = 7228 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 47 × 21 = 987 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 85 × 76 = 6460 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 997 + 641 = 1638 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 26 × 37 = 960 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 52 × 83 = 4316 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 30 × 46 = 1380 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 414 + 477 = 891 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 22 × 58 = 1277 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 72 × 17 = 1224 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 324 + 452 = 776 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 381 + 843 = 1224 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 30 × 77 = 2310 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 243 + 309 = 552 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 606 + 475 = 1081 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 533 + 133 = 666 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 847 + 654 = 1501 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 573 + 196 = 769 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 228 + 189 = 417 right or wrong? (a) Right (b) Wrong

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