Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 282 · 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 472 + 116 = 588 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 13 × 65 = 839 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 74 × 29 = 2146 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 74 × 39 = 2886 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 783 + 749 = 1532 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 399 + 988 = 1394 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 86 × 85 = 7310 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 144 + 560 = 704 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 852 + 787 = 1636 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 97 × 16 = 1550 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 262 + 111 = 373 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 330 + 342 = 679 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 54 × 41 = 2206 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 783 + 818 = 1609 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 679 + 726 = 1405 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 76 × 25 = 1893 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 324 + 159 = 483 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 743 + 124 = 867 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 17 × 17 = 289 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 498 + 296 = 794 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 563 + 238 = 807 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 81 × 86 = 6966 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 12 × 53 = 630 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 30 × 28 = 840 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 775 + 156 = 931 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 487 + 108 = 595 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 589 + 694 = 1283 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 45 × 60 = 2705 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 54 × 51 = 2754 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 333 + 599 = 928 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 53 × 45 = 2385 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 945 + 180 = 1125 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 49 × 19 = 925 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 78 × 40 = 3122 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 518 + 224 = 747 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 191 + 590 = 789 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 910 + 159 = 1075 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 196 + 594 = 783 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 15 × 91 = 1365 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 14 × 84 = 1181 right or wrong? (a) Wrong (b) Right

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