How many 4 digit numbers are there, if it is known that the first digit is even, the second is odd, the third is prime, the fourth (units digit) is divisible by 4, and the digit 2 can be used only once?  Choose one.
A) 20	B) 150	C) 225	D) 300	E) 320
4 options for the first digit: 2, 4, 6, 8;   5 options for the second digit: 1, 3, 5, 7, 9;   4 options for the third digit: 2, 3, 5, 7;   3 options for the fourth digit: 0, 4, 8.   Four digit # possible without the restriction (about the digit 2): 4*5*4*3=240   Numbers with two 2-s, 2X2X 1*5*1*3=15.   Thus there are 240-15= 
<gadget id="calculator">240-15</gadget>
<output>225</output>
225 such numbers.   Answer: 225.
<result>C</result>
How many 4 digit numbers are there, if it is known that the first digit is even, the second is odd, the third is prime, the fourth (units digit) is divisible by 4, and the digit 2 can be used only once?