Nine hundred distinct N-digit numbers are to be formed by using 6, 8 and 9 only. The smallest value of N for which this is possible, is (A) 6 (B) 7 (C) 8 (D) 9

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Question

Nine hundred distinct N-digit numbers are to be formed by using 6, 8 and 9 only. The smallest value of N for which this is possible, is

(A) 6
(B) 7
(C) 8
(D) 9

Prashant Kotian · Accepted Answer

Correct answer:

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