Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 406 · 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 25 × 79 = 1975 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 158 + 973 = 1131 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 13 × 68 = 881 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 306 + 387 = 693 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 86 × 96 = 8254 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 976 + 950 = 1928 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 87 × 40 = 3480 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 70 × 18 = 1252 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 60 × 99 = 5940 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 76 × 49 = 3724 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 55 × 39 = 2143 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 78 × 96 = 7489 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 128 + 308 = 436 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 85 × 91 = 7735 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 22 × 59 = 1298 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 524 + 990 = 1507 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 30 × 53 = 1597 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 71 × 47 = 3334 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 126 + 319 = 444 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 41 × 16 = 653 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 140 + 423 = 563 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 36 × 44 = 1584 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 871 + 572 = 1443 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 152 + 817 = 969 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 801 + 124 = 925 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 79 × 54 = 4257 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 70 × 42 = 2939 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 61 × 69 = 4201 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 30 × 18 = 540 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 499 + 587 = 1086 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 159 + 913 = 1070 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 710 + 407 = 1117 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 15 × 57 = 855 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 164 + 490 = 649 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 38 × 66 = 2501 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 750 + 573 = 1328 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 77 × 69 = 5313 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 978 + 881 = 1866 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 426 + 872 = 1298 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 769 + 669 = 1436 right or wrong? (a) Right (b) Wrong

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