Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 550 · 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 92 × 32 = 2939 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 596 + 934 = 1534 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 528 + 660 = 1191 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 88 × 29 = 2557 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 93 × 86 = 7998 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 17 × 70 = 1190 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 91 × 35 = 3186 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 88 × 78 = 6864 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 41 × 65 = 2659 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 127 + 902 = 1029 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 87 × 14 = 1222 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 28 × 75 = 2100 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 22 × 24 = 523 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 534 + 747 = 1281 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 50 × 98 = 4894 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 80 × 17 = 1362 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 92 × 12 = 1104 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 912 + 739 = 1647 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 21 × 29 = 609 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 33 × 12 = 396 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 944 + 888 = 1833 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 565 + 280 = 845 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 42 × 75 = 3150 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 945 + 993 = 1938 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 477 + 660 = 1137 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 413 + 261 = 672 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 845 + 609 = 1454 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 84 × 97 = 8148 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 321 + 203 = 524 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 254 + 355 = 610 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 72 × 56 = 4030 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 33 × 55 = 1815 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 67 × 14 = 938 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 98 × 79 = 7741 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 60 × 51 = 3060 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 928 + 663 = 1591 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 69 × 98 = 6762 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 29 × 24 = 688 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 97 × 68 = 6592 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 44 × 92 = 4053 right or wrong? (a) Right (b) Wrong

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