请教gwd 一道数学题

zhaozihan

of the 60 animals on a certain farm ,2/3 are either pigs or cows ,How  many of the animals are cows?

(1) the farm has more twice as many cows an it has pigs

()the farm has more than 12 pigs

key : c

个人觉得A 就足够了  请教大家意见

is the integer n odd?

(1)n is divisible by 3

(2)2n is divisible by twice as many positive integers as n

key :B

这道题在prep模拟时就遇到过 不明白到底什么意思

lasiaberyl

第一提的a说的是c》2p 不能确定有多少，加上b的条件可以得到p=13

zhaozihan

3q