Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 565 · 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 66 × 96 = 6328 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 186 + 796 = 987 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 93 × 68 = 6325 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 155 + 182 = 337 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 623 + 365 = 988 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 437 + 194 = 631 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 79 × 89 = 7031 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 58 × 39 = 2262 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 440 + 581 = 1021 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 42 × 18 = 756 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 591 + 602 = 1193 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 472 + 119 = 599 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 905 + 526 = 1436 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 774 + 647 = 1421 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 50 × 46 = 2300 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 60 × 95 = 5700 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 675 + 585 = 1260 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 57 × 15 = 848 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 23 × 82 = 1886 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 309 + 442 = 751 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 88 × 70 = 6153 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 70 × 49 = 3430 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 437 + 958 = 1395 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 774 + 265 = 1039 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 254 + 707 = 969 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 57 × 79 = 4505 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 118 + 694 = 807 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 89 × 41 = 3649 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 34 × 64 = 2176 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 39 × 70 = 2730 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 31 × 28 = 860 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 999 + 262 = 1261 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 18 × 42 = 756 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 305 + 399 = 704 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 679 + 729 = 1408 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 32 × 54 = 1729 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 34 × 17 = 578 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 128 + 494 = 622 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 22 × 80 = 1762 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 21 × 17 = 351 right or wrong? (a) Right (b) Wrong

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