SOLUTION: How many integers are there between 10 and 100 whose digits are all odd

Question 1111075: How many integers are there between 10 and 100 whose digits are all odd
Answer by ikleyn(52800) (Show Source): You can put this solution on YOUR website!
.

From 10 till 99 inclusively:


5*5 = 25.


1, 3, 5, 7, 9  as the tens digit  (5 possibilities)  and 

1, 3, 5, 7, 9  as the units digit  (5 possibilities).


Should I explain more ?

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