Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 481 · 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 50 × 90 = 4497 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 939 + 426 = 1365 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 14 × 37 = 517 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 85 × 96 = 8160 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 55 × 95 = 5234 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 307 + 561 = 868 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 23 × 97 = 2229 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 929 + 847 = 1779 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 65 × 96 = 6233 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 545 + 295 = 840 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 36 × 48 = 1726 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 38 × 82 = 3115 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 666 + 105 = 771 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 860 + 877 = 1737 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 214 + 112 = 326 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 17 × 95 = 1609 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 419 + 705 = 1124 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 114 + 909 = 1031 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 230 + 925 = 1146 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 327 + 915 = 1242 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 760 + 287 = 1047 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 865 + 782 = 1647 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 84 × 37 = 3100 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 80 × 83 = 6640 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 629 + 161 = 790 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 145 + 992 = 1137 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 27 × 89 = 2403 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 41 × 29 = 1189 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 95 × 15 = 1425 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 315 + 574 = 889 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 429 + 918 = 1347 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 54 × 44 = 2378 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 95 × 22 = 2090 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 124 + 132 = 256 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 15 × 26 = 390 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 36 × 44 = 1583 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 306 + 924 = 1230 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 48 × 48 = 2296 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 386 + 288 = 681 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 774 + 512 = 1291 right or wrong? (a) Right (b) Wrong

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