A boy is born when his father is 27 years old. How old will he be when he is exactly half his fathers' age?	Answers:
A) 23	B) 24	C) 25	D) 27	E) 39
when son born:   son s=0   father f=27.   after x years:   son s=x   father f=f+x=27+x:   according to given condition   son age is exactly half his fathers' age...so   x=(27+x)/2---solve this   son age is 27   ANSWER:27
<result>D</result>
A boy is born when his father is 27 years old. How old will he be when he is exactly half his fathers' age?