Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 567 · 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 91 × 15 = 1369 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 27 × 49 = 1323 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 65 × 20 = 1300 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 23 × 16 = 373 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 37 × 81 = 2994 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 173 + 144 = 317 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 16 × 18 = 288 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 16 × 70 = 1118 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 68 × 43 = 2929 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 909 + 989 = 1898 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 148 + 226 = 370 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 412 + 228 = 649 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 22 × 26 = 571 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 19 × 69 = 1304 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 78 × 74 = 5767 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 86 × 26 = 2240 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 135 + 565 = 695 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 72 × 86 = 6192 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 317 + 926 = 1250 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 71 × 96 = 6818 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 688 + 298 = 984 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 14 × 22 = 308 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 86 × 46 = 3956 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 42 × 84 = 3531 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 46 × 70 = 3220 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 401 + 727 = 1128 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 89 × 58 = 5160 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 949 + 713 = 1662 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 119 + 117 = 236 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 273 + 999 = 1271 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 419 + 789 = 1208 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 22 × 23 = 506 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 54 × 51 = 2759 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 623 + 421 = 1044 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 26 × 78 = 2028 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 43 × 74 = 3175 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 52 × 50 = 2600 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 29 × 18 = 525 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 907 + 694 = 1601 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 832 + 213 = 1045 right or wrong? (a) Right (b) Wrong

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