Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 640 · 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 316 + 295 = 611 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 84 × 40 = 3360 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 839 + 958 = 1795 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 235 + 290 = 525 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 706 + 805 = 1511 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 275 + 247 = 522 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 39 × 32 = 1246 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 747 + 251 = 989 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 72 × 50 = 3597 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 33 × 53 = 1749 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 245 + 181 = 426 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 993 + 115 = 1108 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 64 × 15 = 968 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 12 × 63 = 747 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 677 + 448 = 1124 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 239 + 926 = 1165 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 857 + 486 = 1339 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 18 × 22 = 397 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 29 × 27 = 788 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 162 + 791 = 952 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 36 × 58 = 2083 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 448 + 133 = 581 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 153 + 320 = 474 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 85 × 13 = 1105 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 75 × 80 = 5996 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 34 × 35 = 1195 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 30 × 92 = 2759 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 95 × 18 = 1713 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 81 × 15 = 1215 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 298 + 247 = 546 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 542 + 247 = 789 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 20 × 91 = 1820 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 89 × 47 = 4183 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 65 × 23 = 1495 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 46 × 63 = 2898 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 26 × 88 = 2289 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 23 × 13 = 298 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 286 + 681 = 967 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 305 + 181 = 486 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 730 + 545 = 1275 right or wrong? (a) Wrong (b) Right

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