Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 520 · 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 93 × 61 = 5673 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 259 + 705 = 964 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 893 + 509 = 1402 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 62 × 91 = 5647 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 792 + 147 = 935 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 200 + 829 = 1029 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 223 + 230 = 454 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 36 × 93 = 3348 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 720 + 515 = 1235 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 250 + 352 = 604 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 514 + 966 = 1484 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 42 × 98 = 4118 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 14 × 96 = 1344 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 42 × 75 = 3143 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 85 × 25 = 2125 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 467 + 652 = 1125 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 88 × 12 = 1057 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 693 + 683 = 1376 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 822 + 737 = 1559 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 12 × 97 = 1164 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 19 × 26 = 494 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 158 + 408 = 566 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 56 × 98 = 5488 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 309 + 902 = 1212 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 30 × 98 = 2935 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 342 + 285 = 627 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 40 × 98 = 3913 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 16 × 50 = 800 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 15 × 65 = 984 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 47 × 62 = 2914 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 37 × 90 = 3331 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 975 + 112 = 1087 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 18 × 52 = 941 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 283 + 585 = 868 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 830 + 917 = 1747 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 430 + 763 = 1193 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 14 × 23 = 322 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 75 × 73 = 5481 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 303 + 269 = 572 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 72 × 13 = 936 right or wrong? (a) Right (b) Wrong

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