Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 252 · 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 86 × 47 = 4040 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 30 × 26 = 786 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 25 × 73 = 1825 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 28 × 78 = 2184 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 237 + 146 = 383 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 28 × 94 = 2631 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 235 + 178 = 406 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 56 × 21 = 1183 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 212 + 713 = 923 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 23 × 21 = 483 right or wrong? (a) Right (b) Wrong
11. 11.Last-digit check: is 975 + 372 = 1347 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 447 + 688 = 1133 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 160 + 365 = 525 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 91 × 22 = 2006 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 67 × 41 = 2747 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 88 × 95 = 8360 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 644 + 596 = 1247 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 640 + 603 = 1238 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 94 × 80 = 7520 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 971 + 371 = 1340 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 814 + 202 = 1016 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 439 + 328 = 767 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 55 × 52 = 2860 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 498 + 625 = 1129 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 28 × 24 = 672 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 160 + 838 = 1000 right or wrong? (a) Right (b) Wrong
27. 27.Last-digit check: is 142 + 273 = 407 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 51 × 85 = 4335 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 37 × 83 = 3071 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 19 × 23 = 437 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 60 × 28 = 1680 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 905 + 591 = 1494 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 268 + 703 = 971 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 494 + 671 = 1165 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 47 × 18 = 846 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 70 × 78 = 5460 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 445 + 209 = 654 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 12 × 15 = 183 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 714 + 436 = 1158 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 274 + 336 = 610 right or wrong? (a) Wrong (b) Right

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