Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 420 · 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 381 + 495 = 869 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 42 × 32 = 1344 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 615 + 271 = 891 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 24 × 88 = 2120 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 41 × 92 = 3772 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 204 + 518 = 714 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 136 + 693 = 826 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 87 × 94 = 8173 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 439 + 664 = 1098 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 28 × 50 = 1402 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 932 + 887 = 1819 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 49 × 24 = 1172 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 329 + 120 = 448 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 92 × 13 = 1199 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 14 × 40 = 559 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 27 × 62 = 1674 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 99 × 80 = 7920 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 72 × 49 = 3529 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 17 × 29 = 495 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 446 + 214 = 660 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 20 × 60 = 1203 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 88 × 71 = 6248 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 320 + 953 = 1282 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 13 × 74 = 962 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 24 × 17 = 408 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 360 + 293 = 653 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 612 + 207 = 819 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 53 × 88 = 4664 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 52 × 89 = 4620 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 856 + 188 = 1044 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 687 + 115 = 801 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 22 × 77 = 1701 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 83 × 79 = 6557 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 74 × 32 = 2374 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 98 × 53 = 5190 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 37 × 57 = 2103 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 84 × 98 = 8238 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 13 × 92 = 1196 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 66 × 98 = 6467 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 80 × 12 = 957 right or wrong? (a) Wrong (b) Right

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