Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 92 · 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 528 + 918 = 1439 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 30 × 20 = 605 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 247 + 913 = 1160 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 273 + 315 = 588 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 98 × 85 = 8330 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 56 × 29 = 1624 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 99 × 83 = 8217 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 36 × 30 = 1072 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 82 × 94 = 7704 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 99 × 28 = 2764 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 843 + 380 = 1216 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 43 × 70 = 3010 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 21 × 18 = 374 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 53 × 27 = 1426 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 259 + 437 = 690 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 12 × 31 = 372 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 352 + 221 = 565 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 594 + 516 = 1108 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 187 + 418 = 604 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 703 + 884 = 1587 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 921 + 997 = 1926 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 457 + 127 = 589 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 806 + 172 = 971 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 62 × 56 = 3472 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 24 × 50 = 1208 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 40 × 49 = 1960 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 37 × 41 = 1517 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 616 + 876 = 1500 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 289 + 263 = 560 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 42 × 93 = 3906 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 162 + 993 = 1156 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 332 + 898 = 1230 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 331 + 369 = 700 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 44 × 33 = 1450 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 45 × 18 = 810 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 38 × 42 = 1590 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 54 × 34 = 1828 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 61 × 65 = 3968 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 18 × 33 = 594 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 65 × 88 = 5721 right or wrong? (a) Wrong (b) Right

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