Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 351 · 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 608 + 883 = 1482 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 19 × 22 = 414 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 94 × 87 = 8178 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 316 + 299 = 615 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 54 × 54 = 2924 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 50 × 56 = 2795 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 332 + 288 = 620 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 874 + 177 = 1051 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 87 × 24 = 2093 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 30 × 53 = 1590 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 931 + 161 = 1086 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 12 × 72 = 864 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 73 × 23 = 1672 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 51 × 23 = 1180 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 39 × 29 = 1131 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 171 + 273 = 443 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 17 × 17 = 282 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 19 × 66 = 1254 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 237 + 215 = 450 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 443 + 981 = 1424 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 25 × 23 = 570 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 54 × 40 = 2157 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 78 × 86 = 6705 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 29 × 40 = 1160 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 50 × 78 = 3900 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 14 × 39 = 538 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 933 + 585 = 1518 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 326 + 420 = 746 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 286 + 981 = 1267 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 245 + 233 = 470 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 463 + 188 = 651 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 882 + 671 = 1553 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 25 × 32 = 800 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 72 × 44 = 3168 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 50 × 72 = 3601 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 926 + 499 = 1425 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 16 × 64 = 1024 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 71 × 72 = 5105 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 36 × 87 = 3132 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 750 + 952 = 1705 right or wrong? (a) Right (b) Wrong

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