Is the three-digit number n less than 550 ?
(1) The product of the digits in n is 30.
(2) The sum of the digits in n is 10.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
②如721>550,127<550,无法比较。故,②单独不成立。
若①②同时满足,则符合题意的数组为3,2,5,可组成的最大数为532<550,可比较。
但是同时符合一和二的只有2,3,5的组合,最大也就是532,小于550
B选项:随便想想就不满足
AB结合,只有2*3*5这一种,于是满足
(2)insufficient
(1)(2)则符合题意的数组为3,2,5,可组成的最大数为532<550,可比较。
7+2+1=……=2+3+5=10
(1)+(2)的情况下,就只有5,3,2这三个数了,可以
7+2+1=……=2+3+5=10
7+2+1=……=2+3+5=10