1) How many arrangements of the numbers 1, 2, 3, ..., 7 are there where the sum of any two adjacent numbers is odd?



Thanks in advance!


One question at a time thanks. Learn from the answer before you ask the next one.   Melody's addition.

 Mar 16, 2019
edited by computergeek  Mar 17, 2019
edited by Melody  Mar 17, 2019
edited by Melody  Mar 17, 2019

What have you thought about so far?


What will the 2 numbers have to be if their sum is odd?  etc

Talk about your questions. This will help you figure out at least some of it by yourslef and that is how you will lean.




Please no one answer over the top of me.

 Mar 17, 2019

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