Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 723 · 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 49 × 87 = 4266 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 259 + 529 = 783 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 176 + 311 = 483 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 41 × 17 = 696 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 787 + 607 = 1395 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 834 + 809 = 1643 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 326 + 548 = 874 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 913 + 400 = 1313 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 24 × 81 = 1944 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 27 × 34 = 918 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 71 × 72 = 5117 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 278 + 278 = 563 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 146 + 481 = 636 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 25 × 23 = 580 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 60 × 85 = 5100 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 157 + 684 = 841 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 215 + 577 = 797 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 20 × 39 = 780 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 73 × 68 = 4955 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 83 × 76 = 6303 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 69 × 15 = 1027 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 483 + 963 = 1442 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 87 × 35 = 3036 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 77 × 70 = 5396 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 592 + 904 = 1492 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 88 × 30 = 2640 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 550 + 443 = 991 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 431 + 981 = 1419 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 43 × 82 = 3526 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 34 × 83 = 2830 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 256 + 175 = 431 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 871 + 429 = 1300 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 496 + 263 = 763 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 82 × 39 = 3198 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 165 + 452 = 617 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 50 × 97 = 4850 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 98 × 66 = 6466 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 78 × 98 = 7644 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 923 + 382 = 1296 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 33 × 13 = 423 right or wrong? (a) Wrong (b) Right

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