Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 560 · 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 51 × 88 = 4489 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 522 + 203 = 726 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 346 + 979 = 1328 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 71 × 47 = 3339 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 41 × 73 = 2993 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 26 × 34 = 884 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 26 × 89 = 2314 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 74 × 44 = 3254 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 355 + 553 = 908 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 133 + 312 = 445 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 258 + 360 = 618 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 717 + 378 = 1095 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 721 + 884 = 1606 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 76 × 24 = 1824 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 76 × 49 = 3733 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 82 × 65 = 5330 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 830 + 431 = 1261 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 520 + 547 = 1066 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 71 × 84 = 5964 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 48 × 19 = 915 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 85 × 75 = 6377 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 15 × 25 = 375 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 17 × 85 = 1444 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 834 + 984 = 1811 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 675 + 569 = 1241 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 119 + 179 = 298 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 685 + 858 = 1543 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 492 + 841 = 1333 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 536 + 273 = 809 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 953 + 688 = 1641 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 30 × 42 = 1260 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 644 + 367 = 1011 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 434 + 848 = 1282 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 609 + 650 = 1259 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 62 × 57 = 3534 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 73 × 35 = 2551 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 63 × 66 = 4158 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 160 + 266 = 426 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 14 × 39 = 546 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 762 + 201 = 962 right or wrong? (a) Right (b) Wrong

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