How many positive integers less than 30 are either a multiple of 2, an odd prime number, of the sum of a positive multiple of 2 and an odd prime? Choose the correct choice from the following:
A) 29
B) 28
C) 27
D) 25
E) 23
Any odd number can be expressed as 2k+1 or 2k+(3-2) or 2(K-1)+3.   Thus, with the prime number 3,   we can express all the odd numbers.   Since, 1 i is the only number that cannot be expressed,   answer is numbers &lt;30 =29-1.   ANSWER:28
<result>B</result>
How many positive integers less than 30 are either a multiple of 2, an odd prime number, of the sum of a positive multiple of 2 and an odd prime?