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How many whole numbers between 100 and 400 contain the digit 2 in their standard notation?

 Jun 8, 2015

Best Answer 

 #2
avatar+128089 
+5

10(3) + 9(3)  + [100 - 10 - 9]  = 30 + 27 + 81  =  138

 

 

 Jun 9, 2015
 #1
avatar+118587 
+5

Can't you count?

 Jun 8, 2015
 #2
avatar+128089 
+5
Best Answer

10(3) + 9(3)  + [100 - 10 - 9]  = 30 + 27 + 81  =  138

 

 

CPhill Jun 9, 2015

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