Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 245 · 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 28 × 62 = 1741 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 191 + 690 = 885 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 352 + 427 = 779 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 628 + 398 = 1025 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 897 + 624 = 1521 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 959 + 513 = 1481 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 626 + 211 = 837 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 38 × 46 = 1748 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 53 × 63 = 3333 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 656 + 179 = 837 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 343 + 163 = 506 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 58 × 19 = 1107 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 213 + 444 = 656 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 24 × 17 = 401 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 52 × 38 = 1976 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 763 + 648 = 1411 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 499 + 893 = 1391 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 96 × 43 = 4128 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 95 × 34 = 3230 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 78 × 36 = 2808 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 26 × 50 = 1300 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 40 × 97 = 3880 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 223 + 170 = 392 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 94 × 63 = 5922 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 403 + 121 = 517 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 220 + 641 = 870 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 845 + 742 = 1587 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 43 × 25 = 1069 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 563 + 615 = 1178 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 688 + 420 = 1108 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 35 × 92 = 3226 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 698 + 261 = 967 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 16 × 93 = 1488 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 93 × 23 = 2138 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 93 × 55 = 5108 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 95 × 85 = 8075 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 14 × 21 = 302 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 461 + 128 = 587 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 77 × 56 = 4312 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 52 × 86 = 4474 right or wrong? (a) Right (b) Wrong

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