Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 880 · 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 74 × 86 = 6364 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 880 + 275 = 1148 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 35 × 22 = 762 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 909 + 911 = 1820 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 456 + 515 = 976 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 69 × 68 = 4686 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 60 × 57 = 3420 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 60 × 15 = 900 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 63 × 43 = 2709 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 785 + 606 = 1399 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 22 × 41 = 899 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 39 × 72 = 2808 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 42 × 27 = 1134 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 418 + 891 = 1309 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 44 × 31 = 1372 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 76 × 93 = 7068 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 66 × 25 = 1650 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 702 + 616 = 1313 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 945 + 935 = 1880 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 86 × 48 = 4127 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 757 + 108 = 865 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 341 + 440 = 781 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 817 + 995 = 1817 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 32 × 74 = 2368 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 80 × 79 = 6320 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 43 × 26 = 1118 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 743 + 218 = 968 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 83 × 50 = 4150 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 141 + 169 = 310 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 979 + 461 = 1447 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 88 × 24 = 2107 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 37 × 16 = 589 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 534 + 494 = 1020 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 698 + 977 = 1675 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 249 + 640 = 880 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 294 + 240 = 534 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 34 × 45 = 1530 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 28 × 19 = 532 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 19 × 94 = 1777 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 895 + 349 = 1235 right or wrong? (a) Right (b) Wrong

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