Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 683 · 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 81 × 15 = 1215 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 97 × 46 = 4462 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 37 × 48 = 1776 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 95 × 37 = 3520 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 56 × 13 = 726 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 84 × 40 = 3360 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 19 × 43 = 817 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 15 × 46 = 683 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 991 + 196 = 1179 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 521 + 280 = 801 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 57 × 93 = 5308 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 358 + 282 = 640 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 12 × 98 = 1176 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 13 × 59 = 762 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 838 + 758 = 1596 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 77 × 27 = 2079 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 15 × 57 = 855 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 99 × 93 = 9207 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 878 + 769 = 1647 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 21 × 38 = 798 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 715 + 115 = 830 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 32 × 42 = 1351 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 79 × 19 = 1501 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 672 + 459 = 1123 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 963 + 325 = 1288 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 77 × 71 = 5467 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 650 + 192 = 842 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 515 + 313 = 826 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 649 + 727 = 1370 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 32 × 76 = 2432 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 351 + 263 = 622 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 436 + 953 = 1380 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 95 × 70 = 6650 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 793 + 171 = 964 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 54 × 63 = 3395 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 301 + 279 = 578 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 165 + 121 = 286 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 56 × 68 = 3804 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 349 + 466 = 815 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 466 + 639 = 1101 right or wrong? (a) Wrong (b) Right

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