Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 534 · 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 75 × 27 = 2019 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 727 + 399 = 1122 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 108 + 729 = 837 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 75 × 29 = 2175 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 20 × 23 = 460 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 47 × 92 = 4333 right or wrong? (a) Right (b) Wrong
7. 7.Last-digit check: is 206 + 359 = 565 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 31 × 18 = 558 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 939 + 694 = 1633 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 98 × 71 = 6958 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 22 × 34 = 751 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 67 × 16 = 1064 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 33 × 31 = 1023 right or wrong? (a) Right (b) Wrong
14. 14.Last-digit check: is 84 × 62 = 5208 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 91 × 76 = 6908 right or wrong? (a) Right (b) Wrong
16. 16.Last-digit check: is 774 + 847 = 1621 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 29 × 16 = 464 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 154 + 230 = 377 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 673 + 390 = 1063 right or wrong? (a) Wrong (b) Right
20. 20.Last-digit check: is 496 + 780 = 1276 right or wrong? (a) Wrong (b) Right
21. 21.Last-digit check: is 55 × 37 = 2032 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 79 × 92 = 7268 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 84 × 30 = 2520 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 98 × 85 = 8333 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 297 + 629 = 935 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 463 + 870 = 1333 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 91 × 47 = 4270 right or wrong? (a) Wrong (b) Right
28. 28.Last-digit check: is 69 × 32 = 2208 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 856 + 907 = 1769 right or wrong? (a) Wrong (b) Right
30. 30.Last-digit check: is 38 × 59 = 2242 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 62 × 30 = 1860 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 17 × 88 = 1494 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 25 × 91 = 2275 right or wrong? (a) Wrong (b) Right
34. 34.Last-digit check: is 157 + 388 = 548 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 71 × 66 = 4686 right or wrong? (a) Right (b) Wrong
36. 36.Last-digit check: is 120 + 310 = 432 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 709 + 462 = 1165 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 562 + 935 = 1497 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 387 + 522 = 908 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 811 + 515 = 1326 right or wrong? (a) Right (b) Wrong

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