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These would numbers like 1122, 9988, 2233.

There are 81 such numbers. (90 if you allow 0011, 0022, ...)

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Q: How many 4 digit numbers 2 repeated numbers?
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Related questions

How many 5 digit numbers can be made from the numbers 0 1 2 if digits can be repeated?

162


How many 3 digit numbers can be made out of the numbers 1 2 3 and 4?

With repeated digits, 43 = 64 Without repeated digits, 4*3*2 = 24


How many 3-digit numbers can be made using the digits 2 3 7 9?

-- If the same digit may be repeated, then 64 can be made. -- If the same digit may not be repeated, then 24 can be made.


How many four-digit numbers can be formed with the numbers 1234 if no digits can be repeated?

4*3*2*1 = 24


How many 2 digit numbers can be formed with 0 through 5 where 0 is the first digit and others can not be repeated?

-- If 'zero' is always the first digit, then we're pretty darn sure that no other digit can be repeated in the same 2-digit number, since there's only one digit left to be filled in. -- If 'zero' is always the first digit, then there are exactly six possible 2-digit numbers: 00 01 02 03 04 and 05.


How many different 4 digit combinations are there for numbers 1 2 3 4 5 and last numbers are 4 5 no restrictions numbers can be repeated?

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How many four digit numbers can be formed out of 123 if a digit can be repeated?

There are 3 values (1, 2, 3) for each of the 4 digits. Therefore, there are 3*3*3*3 or 81 four digit numbers that can be formed.


How many different 2 digit odd numbers can be formed from the digits 1 through 8 if no digits are repeated in a number?

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How many four digit numbers from the digits 1 2 3 4 5?

If the digits can be repeated, then there are (5 x 5 x 5 x 5) = 625 different four-digit numbers.If the digits can't be repeated, then there are (5 x 4 x 3 x 2) = 120 different four-digit numbers.


How many 2 digit numbers can be made using the digits 3 4 5 if no digit is repeated?

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How many 6 digit numbers can be formed form the digits 123456 if no digits can be repeated?

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How many 4 digit numbers can you make out of 1 1 2 and 3?

If the digits are repeatable, the answer is 4*4*4*4. If the numbers cannot be repeated, then it is 4*3*2*1.