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Earn +20 ptsQ: How many 4 digit numbers 2 repeated numbers?
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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 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?
9
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