Check Your Answers Worksheet

Maths tricks trick 22: Last-digit detective · Set 131 · 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 921 + 195 = 1116 right or wrong? (a) Right (b) Wrong
2. 2.Last-digit check: is 98 × 15 = 1470 right or wrong? (a) Right (b) Wrong
3. 3.Last-digit check: is 76 × 93 = 7068 right or wrong? (a) Right (b) Wrong
4. 4.Last-digit check: is 435 + 765 = 1200 right or wrong? (a) Wrong (b) Right
5. 5.Last-digit check: is 94 × 48 = 4503 right or wrong? (a) Wrong (b) Right
6. 6.Last-digit check: is 835 + 740 = 1580 right or wrong? (a) Wrong (b) Right
7. 7.Last-digit check: is 924 + 219 = 1143 right or wrong? (a) Wrong (b) Right
8. 8.Last-digit check: is 285 + 465 = 750 right or wrong? (a) Wrong (b) Right
9. 9.Last-digit check: is 555 + 964 = 1523 right or wrong? (a) Wrong (b) Right
10. 10.Last-digit check: is 34 × 65 = 2210 right or wrong? (a) Wrong (b) Right
11. 11.Last-digit check: is 88 × 51 = 4485 right or wrong? (a) Right (b) Wrong
12. 12.Last-digit check: is 680 + 237 = 917 right or wrong? (a) Right (b) Wrong
13. 13.Last-digit check: is 78 × 87 = 6781 right or wrong? (a) Wrong (b) Right
14. 14.Last-digit check: is 737 + 791 = 1528 right or wrong? (a) Right (b) Wrong
15. 15.Last-digit check: is 39 × 99 = 3854 right or wrong? (a) Wrong (b) Right
16. 16.Last-digit check: is 74 × 61 = 4519 right or wrong? (a) Right (b) Wrong
17. 17.Last-digit check: is 271 + 108 = 379 right or wrong? (a) Right (b) Wrong
18. 18.Last-digit check: is 711 + 795 = 1497 right or wrong? (a) Wrong (b) Right
19. 19.Last-digit check: is 421 + 615 = 1031 right or wrong? (a) Right (b) Wrong
20. 20.Last-digit check: is 83 × 98 = 8134 right or wrong? (a) Right (b) Wrong
21. 21.Last-digit check: is 47 × 99 = 4650 right or wrong? (a) Wrong (b) Right
22. 22.Last-digit check: is 299 + 218 = 517 right or wrong? (a) Wrong (b) Right
23. 23.Last-digit check: is 38 × 45 = 1712 right or wrong? (a) Right (b) Wrong
24. 24.Last-digit check: is 21 × 52 = 1092 right or wrong? (a) Right (b) Wrong
25. 25.Last-digit check: is 598 + 121 = 728 right or wrong? (a) Right (b) Wrong
26. 26.Last-digit check: is 529 + 536 = 1065 right or wrong? (a) Wrong (b) Right
27. 27.Last-digit check: is 915 + 568 = 1492 right or wrong? (a) Right (b) Wrong
28. 28.Last-digit check: is 18 × 95 = 1714 right or wrong? (a) Right (b) Wrong
29. 29.Last-digit check: is 69 × 65 = 4477 right or wrong? (a) Right (b) Wrong
30. 30.Last-digit check: is 49 × 31 = 1526 right or wrong? (a) Right (b) Wrong
31. 31.Last-digit check: is 16 × 29 = 463 right or wrong? (a) Right (b) Wrong
32. 32.Last-digit check: is 244 + 723 = 967 right or wrong? (a) Wrong (b) Right
33. 33.Last-digit check: is 31 × 30 = 930 right or wrong? (a) Right (b) Wrong
34. 34.Last-digit check: is 92 × 27 = 2484 right or wrong? (a) Wrong (b) Right
35. 35.Last-digit check: is 86 × 88 = 7568 right or wrong? (a) Wrong (b) Right
36. 36.Last-digit check: is 95 × 49 = 4658 right or wrong? (a) Right (b) Wrong
37. 37.Last-digit check: is 803 + 136 = 939 right or wrong? (a) Right (b) Wrong
38. 38.Last-digit check: is 75 × 18 = 1350 right or wrong? (a) Wrong (b) Right
39. 39.Last-digit check: is 50 × 99 = 4953 right or wrong? (a) Wrong (b) Right
40. 40.Last-digit check: is 80 × 77 = 6160 right or wrong? (a) Wrong (b) Right

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