Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 492 · 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 819 + 898 = 1718 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 89 × 21 = 1863 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 890 + 493 = 1390 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 483 + 754 = 1237 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 31 × 24 = 744 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 607 + 764 = 1364 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 917 + 745 = 1662 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 237 + 361 = 598 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 33 × 45 = 1485 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 671 + 324 = 997 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 56 × 89 = 4985 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 16 × 89 = 1424 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 40 × 14 = 560 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 799 + 638 = 1437 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 80 × 88 = 7034 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 97 × 35 = 3390 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 253 + 129 = 382 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 43 × 91 = 3904 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 26 × 49 = 1266 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 961 + 550 = 1511 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 327 + 537 = 864 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 328 + 416 = 744 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 155 + 326 = 481 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 606 + 540 = 1150 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 16 × 39 = 624 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 801 + 991 = 1792 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 484 + 834 = 1315 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 19 × 15 = 285 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 806 + 522 = 1319 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 81 × 30 = 2430 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 825 + 825 = 1652 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 29 × 16 = 459 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 89 × 50 = 4450 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 60 × 76 = 4560 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 534 + 502 = 1036 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 97 × 71 = 6892 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 784 + 412 = 1196 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 673 + 159 = 826 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 906 + 433 = 1339 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 115 + 149 = 259 right or wrong? (a) Right (b) Wrong

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