How many distinct composite numbers can be formed by adding 2 of the first 5 prime numbers?
问题描述：
How many distinct composite numbers can be formed by adding 2 of the first 5 prime numbers?
SAT1的数学题,这题怎么理解?
答
the first five prime numbers are:2,3,5,7,11
add any 2 and see if it is a composite number
if it is a composite number,count 1
That's it.Good luck.