**Question:**

$n$ – digit numbers are formed using only three digits 2,5 and 7. The smallest value of $n$ for which 900 such distinct numbers can be formed, is

Correct Option: 4

JEE Main Previous Year Online April 15, 2018

**Solution:**

$n$ – digit numbers are formed using only three digits 2,5 and 7. The smallest value of $n$ for which 900 such distinct numbers can be formed, is

Correct Option: 4

JEE Main Previous Year Online April 15, 2018
**Solution:**