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I have counting question

 

 

We call a number cozy if every digit in the number is either even or next to an even digit.  For example, a number is cozy if every digit in the number is either a 2 or next to a 2.  For example, the number 222, 72, 45, and 810 and are all cozy.  Also, the numbers 202 and 2772 are cozy.

 

How many 2-digit numbers are cozy?

 

How many 3-digit numbers are cozy?

 Feb 3, 2023
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You say " every digit in the number is either a 2 or next to a 2 ". And yet you list 45, 810 !! So, how are they "cozy" given your statement in quotes ?? Make up your mind !.

 Feb 3, 2023

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