Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 33 · 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 30 × 86 = 2580 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 42 × 42 = 1765 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 219 + 220 = 439 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 88 × 27 = 2376 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 840 + 509 = 1347 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 15 × 64 = 960 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 347 + 882 = 1229 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 317 + 807 = 1124 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 18 × 16 = 297 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 330 + 949 = 1273 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 66 × 94 = 6204 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 429 + 302 = 728 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 54 × 92 = 4968 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 20 × 95 = 1900 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 133 + 310 = 443 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 226 + 396 = 617 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 336 + 996 = 1332 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 159 + 459 = 618 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 41 × 19 = 779 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 110 + 844 = 954 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 29 × 32 = 931 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 62 × 47 = 2914 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 815 + 573 = 1388 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 172 + 505 = 676 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 877 + 727 = 1604 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 59 × 33 = 1947 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 95 × 99 = 9405 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 26 × 23 = 598 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 20 × 46 = 918 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 116 + 327 = 441 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 33 × 60 = 1980 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 16 × 38 = 599 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 916 + 681 = 1588 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 86 × 26 = 2236 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 22 × 69 = 1516 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 70 × 88 = 6160 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 58 × 45 = 2603 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 749 + 948 = 1693 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 219 + 132 = 351 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 35 × 87 = 3040 right or wrong? (a) Wrong (b) Right

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