How many 4-digit positive integers are there in which all 4 digits are even? Choices:
A) 625	B) 600	C) 500	D) 400	E) 256
Positive integers - 2,4,6,8,0   Let the integers of a four digit positive number be AB500D   A can take four values (2,4,6,8)   B can take five values (0,2,4,6,8)   500 can take five values (0,2,4,6,8)   D can take five values (0,2,4,6,8)   The total is 5*5*5*4   The answer according to me is 500   ANSWER:500
<result>C</result>
How many 4-digit positive integers are there in which all 4 digits are even?