+0  
 
-1
115
3
avatar+397 

deleted.

 Oct 28, 2019
edited by sinclairdragon428  Nov 20, 2019
 #1
avatar+308 
+2

We split it up into two cases, one where the first number is odd and one where the first number is even.

 

ODD: We have 3 choices for the first, 2 choices for the second, 3 choices for the third, and so on, giving us a number of 108 possible ways.

 

EVEN: We have 2 choices for the first, 3 choices for the second, 2 choices for the third, and so on, giving us a number of 72 possible ways.

 

108+72 = 180 possible combinations.

 Oct 29, 2019
 #2
avatar+397 
-1

thanks!

sinclairdragon428  Oct 29, 2019
 #3
avatar+308 
+2

You're welcome!

ThatOnePerson  Oct 29, 2019

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