Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 133 · 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 916 + 531 = 1440 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 79 × 71 = 5609 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 91 × 55 = 5000 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 306 + 116 = 422 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 363 + 995 = 1355 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 45 × 91 = 4095 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 76 × 87 = 6612 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 93 × 36 = 3348 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 843 + 341 = 1190 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 20 × 36 = 720 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 69 × 25 = 1726 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 224 + 146 = 370 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 449 + 822 = 1271 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 599 + 501 = 1100 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 931 + 939 = 1870 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 569 + 733 = 1296 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 714 + 435 = 1142 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 36 × 41 = 1476 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 87 × 84 = 7306 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 694 + 674 = 1368 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 372 + 624 = 996 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 70 × 82 = 5745 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 19 × 33 = 634 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 59 × 27 = 1601 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 95 × 23 = 2185 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 33 × 58 = 1914 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 668 + 340 = 1016 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 16 × 90 = 1440 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 375 + 674 = 1049 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 21 × 38 = 803 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 664 + 473 = 1137 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 670 + 923 = 1597 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 442 + 726 = 1165 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 93 × 86 = 7989 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 49 × 31 = 1511 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 290 + 820 = 1110 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 462 + 287 = 745 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 73 × 53 = 3867 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 176 + 191 = 367 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 162 + 295 = 456 right or wrong? (a) Wrong (b) Right

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