Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 48 · 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 33 × 17 = 563 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 41 × 36 = 1468 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 313 + 450 = 761 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 892 + 978 = 1870 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 25 × 29 = 725 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 15 × 38 = 570 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 32 × 40 = 1280 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 777 + 746 = 1523 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 856 + 233 = 1089 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 694 + 473 = 1158 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 78 × 94 = 7335 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 42 × 66 = 2766 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 26 × 86 = 2236 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 26 × 51 = 1326 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 73 × 18 = 1314 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 412 + 298 = 718 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 887 + 509 = 1394 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 510 + 514 = 1027 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 481 + 987 = 1468 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 817 + 249 = 1066 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 865 + 527 = 1388 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 99 × 65 = 6439 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 89 × 33 = 2937 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 320 + 273 = 593 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 523 + 491 = 1018 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 32 × 31 = 993 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 342 + 956 = 1298 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 21 × 53 = 1113 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 209 + 385 = 586 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 27 × 54 = 1458 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 36 × 50 = 1791 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 46 × 58 = 2661 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 486 + 931 = 1417 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 981 + 970 = 1947 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 25 × 31 = 778 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 84 × 76 = 6384 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 78 × 95 = 7410 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 88 × 90 = 7917 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 88 × 62 = 5456 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 432 + 146 = 578 right or wrong? (a) Right (b) Wrong

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