Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 537 · 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 15 × 22 = 330 right or wrong? (a) Wrong (b) Right
2. 2.Last-digit check: is 42 × 41 = 1722 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 37 × 47 = 1734 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 514 + 360 = 874 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 976 + 126 = 1109 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 49 × 64 = 3136 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 370 + 286 = 660 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 60 × 71 = 4251 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 621 + 168 = 789 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 90 × 24 = 2154 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 974 + 670 = 1644 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 395 + 227 = 620 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 893 + 238 = 1126 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 214 + 463 = 678 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 622 + 356 = 978 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 236 + 201 = 437 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 34 × 32 = 1091 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 88 × 95 = 8360 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 214 + 137 = 351 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 19 × 67 = 1265 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 21 × 50 = 1055 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 59 × 97 = 5731 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 578 + 994 = 1571 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 64 × 40 = 2553 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 591 + 685 = 1285 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 337 + 521 = 858 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 338 + 234 = 581 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 221 + 280 = 497 right or wrong? (a) Wrong (b) Right
29. 29.Last-digit check: is 268 + 271 = 533 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 771 + 244 = 1015 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 312 + 204 = 516 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 13 × 19 = 243 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 26 × 81 = 2099 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 980 + 587 = 1567 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 91 × 55 = 5005 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 773 + 462 = 1235 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 92 × 66 = 6071 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 827 + 136 = 963 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 31 × 17 = 528 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 48 × 38 = 1823 right or wrong? (a) Wrong (b) Right

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