Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 378 · 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 26 × 24 = 624 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 409 + 308 = 717 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 852 + 512 = 1367 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 55 × 76 = 4180 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 285 + 254 = 531 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 17 × 89 = 1510 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 24 × 33 = 798 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 32 × 75 = 2400 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 583 + 395 = 974 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 371 + 271 = 649 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 43 × 72 = 3100 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 530 + 273 = 803 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 21 × 41 = 861 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 27 × 16 = 432 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 14 × 20 = 280 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 117 + 195 = 312 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 97 × 42 = 4071 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 45 × 97 = 4374 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 496 + 771 = 1259 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 114 + 602 = 716 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 40 × 14 = 560 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 446 + 490 = 936 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 844 + 384 = 1228 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 298 + 565 = 863 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 27 × 55 = 1480 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 99 × 39 = 3861 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 291 + 649 = 940 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 728 + 572 = 1306 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 91 × 33 = 3003 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 76 × 25 = 1891 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 157 + 953 = 1110 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 19 × 49 = 922 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 55 × 32 = 1767 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 841 + 683 = 1524 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 549 + 796 = 1345 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 90 × 60 = 5399 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 251 + 945 = 1197 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 38 × 34 = 1295 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 461 + 165 = 619 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 35 × 37 = 1295 right or wrong? (a) Right (b) Wrong

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