Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 633 · 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 47 × 53 = 2488 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 93 × 66 = 6129 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 30 × 78 = 2345 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 35 × 16 = 560 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 431 + 635 = 1074 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 28 × 98 = 2744 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 38 × 74 = 2808 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 37 × 24 = 894 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 34 × 39 = 1317 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 33 × 65 = 2151 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 126 + 550 = 681 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 54 × 88 = 4752 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 666 + 752 = 1421 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 36 × 71 = 2547 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 48 × 77 = 3696 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 48 × 38 = 1819 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 41 × 20 = 813 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 909 + 210 = 1123 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 43 × 39 = 1677 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 374 + 394 = 775 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 49 × 82 = 4022 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 61 × 20 = 1220 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 48 × 46 = 2199 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 181 + 950 = 1131 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 51 × 21 = 1070 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 32 × 98 = 3142 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 71 × 82 = 5830 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 343 + 887 = 1224 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 822 + 554 = 1384 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 896 + 467 = 1363 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 777 + 655 = 1432 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 20 × 64 = 1276 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 93 × 67 = 6231 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 900 + 129 = 1027 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 60 × 97 = 5820 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 188 + 892 = 1080 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 38 × 54 = 2052 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 91 × 44 = 4005 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 593 + 891 = 1484 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 318 + 593 = 909 right or wrong? (a) Right (b) Wrong

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