Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 785 · 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 357 + 265 = 614 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 164 + 517 = 681 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 723 + 227 = 950 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 891 + 344 = 1237 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 627 + 960 = 1587 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 187 + 660 = 846 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 832 + 635 = 1472 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 342 + 332 = 674 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 98 × 23 = 2254 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 234 + 665 = 899 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 65 × 98 = 6376 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 61 × 22 = 1340 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 13 × 94 = 1215 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 23 × 49 = 1127 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 36 × 55 = 1980 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 98 × 76 = 7448 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 81 × 36 = 2915 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 62 × 93 = 5766 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 83 × 21 = 1749 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 761 + 754 = 1515 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 265 + 383 = 648 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 264 + 636 = 900 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 533 + 629 = 1159 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 411 + 831 = 1248 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 313 + 855 = 1160 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 98 × 51 = 4998 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 73 × 80 = 5840 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 109 + 982 = 1091 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 80 × 26 = 2077 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 574 + 730 = 1303 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 131 + 308 = 438 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 81 × 42 = 3403 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 88 × 81 = 7122 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 82 × 24 = 1968 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 20 × 15 = 300 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 62 × 43 = 2666 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 12 × 23 = 280 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 499 + 382 = 889 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 657 + 363 = 1020 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 45 × 66 = 2970 right or wrong? (a) Right (b) Wrong

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