Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 172 · 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 97 × 43 = 4171 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 45 × 59 = 2655 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 29 × 97 = 2818 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 376 + 965 = 1349 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 268 + 835 = 1103 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 83 × 95 = 7886 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 31 × 27 = 838 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 52 × 83 = 4307 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 497 + 368 = 865 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 605 + 351 = 954 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 76 × 52 = 3952 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 34 × 20 = 681 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 76 × 70 = 5320 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 28 × 42 = 1176 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 828 + 614 = 1446 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 73 × 64 = 4674 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 761 + 578 = 1338 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 148 + 683 = 831 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 114 + 372 = 490 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 83 × 42 = 3477 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 139 + 442 = 581 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 150 + 862 = 1007 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 22 × 79 = 1743 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 803 + 271 = 1068 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 984 + 812 = 1791 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 31 × 37 = 1149 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 132 + 197 = 329 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 30 × 21 = 622 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 429 + 669 = 1099 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 419 + 548 = 967 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 18 × 93 = 1681 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 58 × 77 = 4466 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 324 + 561 = 885 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 68 × 56 = 3808 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 851 + 958 = 1809 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 141 + 560 = 704 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 143 + 211 = 354 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 55 × 28 = 1540 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 114 + 776 = 890 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 59 × 76 = 4487 right or wrong? (a) Wrong (b) Right

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