Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 740 · 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 25 × 19 = 475 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 671 + 933 = 1600 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 56 × 41 = 2296 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 306 + 414 = 720 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 70 × 42 = 2940 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 80 × 27 = 2160 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 996 + 801 = 1788 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 26 × 25 = 650 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 278 + 269 = 538 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 154 + 263 = 423 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 604 + 748 = 1352 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 79 × 78 = 6162 right or wrong? (a) Wrong (b) Right
13. 13.Last-digit check: is 98 × 72 = 7051 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 23 × 59 = 1360 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 94 × 76 = 7138 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 62 × 22 = 1364 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 324 + 211 = 535 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 15 × 92 = 1381 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 85 × 18 = 1521 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 12 × 37 = 444 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 54 × 87 = 4698 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 88 × 44 = 3872 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 357 + 586 = 943 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 47 × 48 = 2256 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 972 + 362 = 1343 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 89 × 29 = 2584 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 23 × 16 = 363 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 12 × 35 = 411 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 25 × 29 = 725 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 974 + 126 = 1100 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 42 × 61 = 2562 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 69 × 85 = 5873 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 29 × 23 = 667 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 553 + 787 = 1340 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 37 × 28 = 1027 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 18 × 39 = 699 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 98 × 37 = 3626 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 857 + 566 = 1426 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 20 × 96 = 1920 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 23 × 26 = 598 right or wrong? (a) Wrong (b) Right

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