Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 462 · 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 878 + 199 = 1077 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 530 + 394 = 924 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 15 × 52 = 779 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 23 × 57 = 1311 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 13 × 64 = 837 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 15 × 75 = 1125 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 667 + 657 = 1326 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 77 × 29 = 2231 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 649 + 522 = 1171 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 620 + 779 = 1399 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 966 + 158 = 1116 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 55 × 66 = 3630 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 368 + 933 = 1297 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 25 × 61 = 1525 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 902 + 276 = 1178 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 12 × 61 = 740 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 362 + 225 = 587 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 65 × 21 = 1365 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 878 + 145 = 1025 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 61 × 95 = 5794 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 768 + 279 = 1047 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 64 × 75 = 4800 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 46 × 96 = 4423 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 58 × 57 = 3313 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 947 + 298 = 1239 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 54 × 42 = 2264 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 45 × 41 = 1845 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 17 × 33 = 561 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 48 × 47 = 2249 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 22 × 62 = 1371 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 435 + 717 = 1144 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 77 × 44 = 3388 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 546 + 946 = 1492 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 62 × 20 = 1240 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 631 + 892 = 1514 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 71 × 96 = 6817 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 718 + 135 = 853 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 691 + 291 = 982 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 809 + 298 = 1115 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 98 × 70 = 6860 right or wrong? (a) Right (b) Wrong

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