Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 760 · 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 57 × 14 = 798 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 603 + 354 = 957 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 32 × 69 = 2208 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 64 × 18 = 1149 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 23 × 82 = 1886 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 608 + 774 = 1382 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 49 × 49 = 2401 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 97 × 40 = 3880 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 86 × 84 = 7224 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 747 + 421 = 1168 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 45 × 70 = 3141 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 882 + 489 = 1371 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 19 × 20 = 380 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 545 + 284 = 829 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 71 × 79 = 5609 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 87 × 87 = 7561 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 84 × 18 = 1512 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 46 × 62 = 2852 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 18 × 95 = 1711 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 282 + 404 = 686 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 370 + 262 = 635 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 774 + 211 = 985 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 724 + 481 = 1203 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 98 × 25 = 2449 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 92 × 14 = 1288 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 83 × 29 = 2407 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 16 × 23 = 368 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 73 × 95 = 6935 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 27 × 91 = 2457 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 70 × 23 = 1606 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 809 + 917 = 1735 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 94 × 53 = 4987 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 94 × 24 = 2252 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 128 + 919 = 1047 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 83 × 59 = 4899 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 52 × 47 = 2441 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 92 × 24 = 2208 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 212 + 415 = 626 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 143 + 282 = 425 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 624 + 564 = 1188 right or wrong? (a) Wrong (b) Right

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