Q:
How many four digits numbers greater than 6000 can be made using the digits 0, 4, 2, 6 together with repetition.
Answer & Explanation
Answer: B) 63
Explanation: Given digits are 0, 4, 2, 6
Required 4 digit number should be greater than 6000.
So, first digit must be 6 only and the remaining three places can be filled by one of all the four digits.
This can be done by
1x4x4x4 = 64
Greater than 6000 means 6000 should not be there.
Hence, 64 - 1 = 63.
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