Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 761 · 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 666 + 840 = 1503 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 19 × 32 = 608 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 26 × 21 = 539 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 332 + 507 = 839 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 22 × 40 = 880 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 64 × 71 = 4544 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 554 + 872 = 1427 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 396 + 315 = 711 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 19 × 25 = 478 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 283 + 320 = 596 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 96 × 78 = 7488 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 31 × 74 = 2285 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 259 + 467 = 726 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 917 + 928 = 1845 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 91 × 33 = 3003 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 30 × 65 = 1950 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 480 + 581 = 1061 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 712 + 511 = 1221 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 78 × 72 = 5616 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 136 + 704 = 840 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 88 × 63 = 5544 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 211 + 563 = 769 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 87 × 22 = 1914 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 80 × 65 = 5193 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 364 + 925 = 1298 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 32 × 39 = 1255 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 351 + 433 = 784 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 284 + 263 = 547 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 627 + 213 = 831 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 52 × 99 = 5148 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 25 × 44 = 1100 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 780 + 184 = 964 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 74 × 99 = 7326 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 307 + 987 = 1294 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 42 × 54 = 2268 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 33 × 85 = 2801 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 370 + 434 = 799 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 84 × 79 = 6640 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 45 × 85 = 3819 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 988 + 481 = 1476 right or wrong? (a) Wrong (b) Right

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