Unit Digit questions for ssc, railways and csat

Most imp questions asked in exams based on the concept of unit digit

1. Which of the following cant be the unit’s digit of perfect square ? 4 8 9 6

2. What is the unit digit of the sum of first 111 whole numbers? 4 6 5

3. The digit in unit’s place of the product 81 × 82 × 83 × ……….. × 89 is _____ 2 6 8

4. What is the unit digit of 167 × 2183 × 497 × 839 × 235 × 111 × 1039 × 251 × 563 ? 5 1 7

5. What is the unit digit of 2 51 2 8 1 4

6. The rightmost non zero digit of the number 30 2928 1 3 7 9

7. Find the digit in the thousand's place of 5 3 × 2 1001 2 4 8

8. The unit digit of (3333) n is 7, then what is unit’s digit of (7777) n 1 3 7 9

9. The unit digit of 433 × 456 × 43N is N+2, then what is the value of N? 1 8 3 6

10. The unit digit of (2153) 167 × (8267) 153 is 1 3 7 9

11. The unit digit of 2 12 × 3 20 × 4 30 × 5 42 × 6 56 × 7 72 × 8 90 is 2 1 3

12. The unit digit of (217) 413 × (819) 547 × (414) 624 × (342) 812 is 2 4 6 8

13. The unit digit of (137 13 ) 47 is 1 3 7 9

14. The unit digit of is 1 3 7 9  

15. The unit digit of (8735 827 + 1693 469 ) × (7339 1256 - 244 311 ) × 5827 935 is 2 4 6 8

16. Let X = (633) 24 – (277) 38 + (266) 54 . What is unit digit of X? 8 4 6 7

17. The unit digit of (198 101 × 644 255 ) + 529 132 – 207 85 – 343 43 – 625 88 is ? 1 2 4 5

18. The remainder, when (731) 730 is divided by 9 is “a”. The number at ten’s place of a 332524 is ? 2 3 1 4