Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 702 · 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 13 × 60 = 780 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 71 × 71 = 5038 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 31 × 47 = 1461 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 506 + 213 = 719 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 777 + 875 = 1649 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 24 × 66 = 1587 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 99 × 21 = 2071 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 592 + 684 = 1276 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 26 × 25 = 650 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 736 + 277 = 1004 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 118 + 722 = 840 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 53 × 18 = 958 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 40 × 64 = 2562 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 38 × 25 = 944 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 51 × 90 = 4590 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 866 + 524 = 1393 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 299 + 732 = 1023 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 86 × 14 = 1206 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 854 + 977 = 1839 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 27 × 41 = 1109 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 16 × 50 = 796 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 71 × 60 = 4255 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 727 + 624 = 1349 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 326 + 260 = 591 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 501 + 294 = 795 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 273 + 531 = 804 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 55 × 57 = 3135 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 124 + 954 = 1078 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 666 + 617 = 1275 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 774 + 941 = 1710 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 86 × 35 = 3003 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 991 + 378 = 1369 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 69 × 85 = 5858 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 444 + 296 = 744 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 79 × 15 = 1194 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 34 × 98 = 3331 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 389 + 393 = 782 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 35 × 95 = 3325 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 30 × 97 = 2910 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 60 × 80 = 4797 right or wrong? (a) Right (b) Wrong

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