Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 925 · 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 66 × 74 = 4880 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 37 × 83 = 3071 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 80 × 92 = 7360 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 76 × 44 = 3344 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 169 + 204 = 373 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 79 × 88 = 6952 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 17 × 34 = 578 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 717 + 251 = 968 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 21 × 85 = 1791 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 188 + 206 = 395 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 635 + 816 = 1454 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 36 × 21 = 756 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 840 + 940 = 1780 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 56 × 26 = 1456 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 12 × 73 = 876 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 91 × 14 = 1278 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 317 + 835 = 1152 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 230 + 959 = 1189 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 304 + 598 = 897 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 797 + 150 = 947 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 641 + 652 = 1293 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 21 × 91 = 1911 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 84 × 44 = 3695 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 133 + 105 = 236 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 99 × 20 = 1980 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 33 × 56 = 1853 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 21 × 17 = 356 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 33 × 36 = 1184 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 259 + 877 = 1136 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 678 + 229 = 911 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 12 × 82 = 976 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 14 × 37 = 518 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 745 + 421 = 1175 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 182 + 346 = 536 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 446 + 978 = 1424 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 310 + 285 = 595 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 82 × 96 = 7863 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 92 × 97 = 8928 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 128 + 421 = 552 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 32 × 38 = 1216 right or wrong? (a) Right (b) Wrong

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