Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 210 · 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 71 × 16 = 1145 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 945 + 641 = 1590 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 203 + 895 = 1099 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 74 × 22 = 1620 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 596 + 718 = 1322 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 335 + 626 = 969 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 13 × 69 = 894 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 431 + 632 = 1063 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 61 × 90 = 5491 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 93 × 69 = 6417 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 35 × 83 = 2905 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 387 + 282 = 670 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 61 × 19 = 1157 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 98 × 14 = 1379 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 41 × 23 = 936 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 200 + 780 = 975 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 754 + 336 = 1090 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 996 + 532 = 1526 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 708 + 980 = 1695 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 893 + 719 = 1612 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 536 + 478 = 1014 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 53 × 16 = 855 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 18 × 39 = 705 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 46 × 53 = 2431 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 15 × 94 = 1415 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 870 + 333 = 1204 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 112 + 575 = 682 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 503 + 146 = 649 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 40 × 24 = 960 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 79 × 49 = 3871 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 849 + 182 = 1038 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 203 + 672 = 875 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 18 × 17 = 310 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 87 × 70 = 6090 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 209 + 461 = 670 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 88 × 25 = 2202 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 70 × 80 = 5600 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 76 × 97 = 7372 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 14 × 72 = 1007 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 318 + 525 = 842 right or wrong? (a) Right (b) Wrong

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