Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 935 · 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 84 × 67 = 5621 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 20 × 46 = 920 right or wrong? (a) Wrong (b) Right
3. 3.Last-digit check: is 958 + 902 = 1860 right or wrong? (a) Wrong (b) Right
4. 4.Last-digit check: is 791 + 309 = 1100 right or wrong? (a) Right (b) Wrong
5. 5.Last-digit check: is 374 + 393 = 767 right or wrong? (a) Right (b) Wrong
6. 6.Last-digit check: is 283 + 181 = 464 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 48 × 21 = 1008 right or wrong? (a) Right (b) Wrong
8. 8.Last-digit check: is 52 × 23 = 1196 right or wrong? (a) Right (b) Wrong
9. 9.Last-digit check: is 14 × 61 = 856 right or wrong? (a) Right (b) Wrong
10. 10.Last-digit check: is 25 × 50 = 1253 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 57 × 16 = 912 right or wrong? (a) Wrong (b) Right
12. 12.Last-digit check: is 760 + 377 = 1134 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 124 + 124 = 248 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 147 + 310 = 453 right or wrong? (a) Wrong (b) Right
15. 15.Last-digit check: is 498 + 273 = 771 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 16 × 56 = 896 right or wrong? (a) Wrong (b) Right
17. 17.Last-digit check: is 17 × 24 = 408 right or wrong? (a) Wrong (b) Right
18. 18.Last-digit check: is 176 + 560 = 736 right or wrong? (a) Right (b) Wrong
19. 19.Last-digit check: is 753 + 379 = 1127 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 74 × 70 = 5188 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 38 × 58 = 2203 right or wrong? (a) Right (b) Wrong
22. 22.Last-digit check: is 17 × 51 = 858 right or wrong? (a) Right (b) Wrong
23. 23.Last-digit check: is 78 × 13 = 1014 right or wrong? (a) Wrong (b) Right
24. 24.Last-digit check: is 463 + 158 = 621 right or wrong? (a) Wrong (b) Right
25. 25.Last-digit check: is 249 + 201 = 450 right or wrong? (a) Wrong (b) Right
26. 26.Last-digit check: is 332 + 623 = 957 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 56 × 27 = 1503 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 27 × 14 = 375 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 81 × 27 = 2187 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 417 + 707 = 1124 right or wrong? (a) Wrong (b) Right
31. 31.Last-digit check: is 28 × 75 = 2098 right or wrong? (a) Wrong (b) Right
32. 32.Last-digit check: is 59 × 68 = 4012 right or wrong? (a) Right (b) Wrong
33. 33.Last-digit check: is 70 × 95 = 6650 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 921 + 407 = 1333 right or wrong? (a) Right (b) Wrong
35. 35.Last-digit check: is 409 + 948 = 1354 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 796 + 884 = 1683 right or wrong? (a) Wrong (b) Right
37. 37.Last-digit check: is 899 + 184 = 1083 right or wrong? (a) Wrong (b) Right
38. 38.Last-digit check: is 432 + 147 = 579 right or wrong? (a) Right (b) Wrong
39. 39.Last-digit check: is 50 × 91 = 4550 right or wrong? (a) Right (b) Wrong
40. 40.Last-digit check: is 78 × 50 = 3900 right or wrong? (a) Right (b) Wrong

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