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CGP EDU Academic Team
Published on: August 13, 2026
An n digit number is a positive number with exactly n digits. Nine hundred distinct n -digit numbers are to be formed using only the three digits 2, 5 and 7. The smallest value of n 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 n -digit numbers are 
. Since we have to form 900 distinct numbers, hence 
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