Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 573 · 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 54 × 82 = 4428 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 253 + 765 = 1016 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 33 × 21 = 696 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 321 + 223 = 542 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 35 × 81 = 2837 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 86 × 37 = 3182 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 63 × 80 = 5040 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 25 × 29 = 725 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 497 + 349 = 837 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 474 + 577 = 1051 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 672 + 302 = 971 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 243 + 490 = 741 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 34 × 41 = 1391 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 721 + 203 = 924 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 55 × 39 = 2145 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 96 × 24 = 2304 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 279 + 372 = 651 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 33 × 56 = 1848 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 44 × 26 = 1144 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 63 × 54 = 3407 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 721 + 286 = 1007 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 911 + 292 = 1207 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 57 × 43 = 2453 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 17 × 41 = 697 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 312 + 226 = 538 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 594 + 889 = 1483 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 58 × 33 = 1914 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 96 × 81 = 7773 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 61 × 74 = 4506 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 75 × 98 = 7346 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 933 + 846 = 1779 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 186 + 988 = 1174 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 290 + 714 = 1004 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 597 + 309 = 906 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 31 × 48 = 1488 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 22 × 59 = 1291 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 781 + 205 = 981 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 692 + 300 = 992 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 176 + 993 = 1169 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 424 + 285 = 709 right or wrong? (a) Wrong (b) Right

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