Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 585 · 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 600 + 993 = 1593 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 94 × 66 = 6204 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 20 × 19 = 380 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 17 × 55 = 936 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 55 × 25 = 1375 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 32 × 42 = 1340 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 48 × 85 = 4079 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 76 × 66 = 5016 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 30 × 65 = 1950 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 116 + 282 = 398 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 790 + 624 = 1415 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 740 + 559 = 1304 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 29 × 12 = 351 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 83 × 99 = 8213 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 58 × 25 = 1450 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 941 + 435 = 1376 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 48 × 15 = 720 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 36 × 73 = 2632 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 90 × 91 = 8190 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 15 × 21 = 315 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 970 + 890 = 1869 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 719 + 388 = 1107 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 704 + 262 = 965 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 41 × 71 = 2911 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 44 × 49 = 2156 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 585 + 367 = 952 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 643 + 805 = 1448 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 33 × 47 = 1555 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 87 × 71 = 6177 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 89 × 85 = 7559 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 99 × 85 = 8410 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 189 + 807 = 1004 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 577 + 950 = 1534 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 15 × 88 = 1325 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 93 × 25 = 2325 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 62 × 34 = 2108 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 809 + 659 = 1468 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 82 × 43 = 3529 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 274 + 857 = 1134 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 30 × 84 = 2522 right or wrong? (a) Right (b) Wrong

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