Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 332 · 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 50 × 26 = 1306 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 602 + 421 = 1029 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 927 + 273 = 1204 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 872 + 252 = 1124 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 75 × 44 = 3300 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 975 + 665 = 1635 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 825 + 179 = 1004 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 26 × 23 = 598 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 91 × 12 = 1092 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 532 + 348 = 880 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 518 + 214 = 732 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 68 × 46 = 3131 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 939 + 289 = 1228 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 224 + 970 = 1189 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 89 × 66 = 5879 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 885 + 536 = 1421 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 19 × 87 = 1653 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 239 + 497 = 736 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 43 × 91 = 3909 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 26 × 24 = 624 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 70 × 70 = 4900 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 565 + 246 = 811 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 17 × 98 = 1672 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 77 × 31 = 2387 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 29 × 48 = 1392 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 297 + 760 = 1048 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 688 + 747 = 1432 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 80 × 31 = 2480 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 392 + 838 = 1230 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 799 + 256 = 1057 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 50 × 65 = 3243 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 23 × 18 = 414 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 734 + 438 = 1172 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 74 × 20 = 1480 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 647 + 923 = 1564 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 30 × 73 = 2190 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 94 × 91 = 8554 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 60 × 33 = 1986 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 31 × 16 = 496 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 940 + 325 = 1265 right or wrong? (a) Right (b) Wrong

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