Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 353 · 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 65 × 91 = 5915 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 207 + 129 = 333 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 917 + 911 = 1829 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 296 + 276 = 575 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 55 × 97 = 5335 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 515 + 826 = 1341 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 436 + 811 = 1247 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 68 × 16 = 1089 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 88 × 96 = 8447 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 54 × 71 = 3832 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 487 + 178 = 665 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 68 × 38 = 2579 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 16 × 50 = 808 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 95 × 15 = 1425 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 16 × 49 = 784 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 68 × 14 = 952 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 317 + 131 = 448 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 70 × 84 = 5889 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 70 × 33 = 2309 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 68 × 68 = 4620 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 914 + 294 = 1212 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 98 × 25 = 2450 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 444 + 568 = 1012 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 60 × 36 = 2160 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 884 + 489 = 1373 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 243 + 332 = 572 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 63 × 16 = 1008 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 167 + 421 = 594 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 987 + 875 = 1862 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 26 × 23 = 598 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 75 × 14 = 1050 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 552 + 615 = 1167 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 25 × 76 = 1900 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 350 + 641 = 984 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 54 × 15 = 810 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 66 × 17 = 1122 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 31 × 53 = 1637 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 928 + 343 = 1271 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 442 + 536 = 978 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 510 + 158 = 667 right or wrong? (a) Wrong (b) Right

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