Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 490 · 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 214 + 758 = 972 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 250 + 752 = 1007 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 13 × 51 = 663 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 48 × 78 = 3744 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 75 × 91 = 6820 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 57 × 62 = 3539 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 50 × 30 = 1505 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 32 × 60 = 1919 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 877 + 213 = 1090 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 947 + 825 = 1774 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 78 × 15 = 1170 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 341 + 325 = 666 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 593 + 381 = 974 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 73 × 99 = 7227 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 516 + 593 = 1109 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 468 + 134 = 607 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 990 + 123 = 1117 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 30 × 33 = 990 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 61 × 50 = 3050 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 32 × 72 = 2313 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 494 + 345 = 835 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 399 + 250 = 649 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 475 + 458 = 941 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 68 × 57 = 3870 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 91 × 45 = 4095 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 921 + 569 = 1487 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 213 + 314 = 527 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 49 × 25 = 1227 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 29 × 57 = 1653 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 883 + 914 = 1804 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 630 + 427 = 1060 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 33 × 78 = 2567 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 341 + 710 = 1051 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 85 × 19 = 1615 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 98 × 33 = 3232 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 954 + 637 = 1591 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 22 × 45 = 990 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 647 + 244 = 891 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 24 × 39 = 938 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 17 × 96 = 1636 right or wrong? (a) Wrong (b) Right

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