Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 155 · 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 280 + 809 = 1089 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 14 × 46 = 635 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 965 + 969 = 1941 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 42 × 84 = 3528 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 279 + 762 = 1041 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 90 × 40 = 3601 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 658 + 711 = 1369 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 545 + 814 = 1368 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 25 × 23 = 575 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 84 × 99 = 8316 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 499 + 793 = 1292 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 70 × 51 = 3579 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 759 + 820 = 1579 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 89 × 19 = 1691 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 45 × 66 = 2963 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 12 × 41 = 492 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 967 + 927 = 1894 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 341 + 511 = 852 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 181 + 353 = 536 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 61 × 55 = 3357 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 76 × 83 = 6316 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 819 + 828 = 1647 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 86 × 29 = 2495 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 28 × 82 = 2290 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 84 × 20 = 1680 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 20 × 70 = 1391 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 438 + 646 = 1088 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 48 × 72 = 3458 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 581 + 550 = 1131 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 30 × 14 = 420 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 48 × 79 = 3799 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 83 × 76 = 6308 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 218 + 170 = 388 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 85 × 55 = 4666 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 22 × 48 = 1056 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 468 + 559 = 1024 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 715 + 138 = 853 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 958 + 784 = 1746 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 59 × 21 = 1239 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 21 × 47 = 987 right or wrong? (a) Wrong (b) Right

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