A credit card number has 6 digits (between 1 to 9 inclusive). The first two digits are 12 in that order, the third digit is bigger than 6, the fourth digit is divisible by 2, and the fifth digit is 4 times the sixth. How many different credit card numbers are possible?	Choose the correct choice from the following answers:  A) 12  B) 18  C) 24  D) 36  E) 48
The first two digits are fixed.   The third digit can be 7, 8, or 9 so there are 3 choices.   The fourth digit can be 2, 4, 6, or 8 so there are 4 choices.   The fifth digit depends entirely on the sixth digit.   The sixth digit can be 1 or 2 so there are 2 choices.   The number of possibilities is  3*4*2= 
<gadget id="calculator"> 3*4*2</gadget>
<output>24</output>
24   The answer is 24.
<result>C</result>
A credit card number has 6 digits (between 1 to 9 inclusive). The first two digits are 12 in that order, the third digit is bigger than 6, the fourth digit is divisible by 2, and the fifth digit is 4 times the sixth. How many different credit card numbers are possible?