upsc-prelims
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 4 and 5 without repetition of digits? |
|
0 | 46 | 15 October 2020 |
| Let p, q, r and s be natural numbers such that p - 2016 = q + 2017 = r - 2018 = s +2019. Which one of the following is the largest natural number? |
|
0 | 66 | 15 October 2020 |
| UPSC CSE 2020 Preliminary Exam - Question Papers & Answer Key (GS I & II) |
|
0 | 48 | 14 October 2020 |