Published by:
CGP EDU Academic Team
Published on: August 13, 2026
An n -digit number is a positive number with exactly 
digits. Nine hundred distinct n -digit numbers are to be formed using only the three digits 2, 5 and 7. The smallest value of 
for which this is possible is
Text Solution
Verified by ExpertsThe correct answer is:
B
Since at any place, any of the digits 2, 5 and 7 can be used, total number of such positive 
-digit numbers are 
. Since we have to form 900 distinct numbers, hence 
.
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