How many two-digit integers exist such that all their digits are odd?  Select the correct option:	A) 80	B) 25	C) 120	D) 125	E) 135
so last digit can be filled in 5 ways- 1,3,5,7,9   there are 5 possibilities. The answer is 5∗5=25   The correct answer is 25
<result>B</result>
How many two-digit integers exist such that all their digits are odd?