Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 329 · 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 92 × 91 = 8372 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 26 × 43 = 1109 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 793 + 742 = 1538 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 49 × 27 = 1323 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 734 + 954 = 1688 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 777 + 483 = 1264 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 41 × 12 = 495 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 20 × 70 = 1400 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 41 × 37 = 1517 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 432 + 440 = 872 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 46 × 67 = 3082 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 75 × 58 = 4350 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 803 + 712 = 1515 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 657 + 591 = 1249 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 74 × 22 = 1628 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 685 + 528 = 1204 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 23 × 27 = 626 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 34 × 42 = 1428 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 37 × 82 = 3034 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 729 + 546 = 1266 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 89 × 35 = 3106 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 16 × 32 = 513 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 88 × 90 = 7920 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 51 × 32 = 1632 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 93 × 23 = 2139 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 26 × 25 = 649 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 66 × 27 = 1782 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 65 × 50 = 3246 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 66 × 42 = 2763 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 256 + 700 = 953 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 15 × 53 = 795 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 23 × 18 = 414 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 63 × 63 = 3969 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 247 + 282 = 538 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 43 × 70 = 3010 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 209 + 764 = 973 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 99 × 29 = 2870 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 91 × 33 = 3003 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 22 × 77 = 1694 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 31 × 95 = 2945 right or wrong? (a) Right (b) Wrong

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