here are two mothers and two daughters,how many people at least are there?IQ

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here are two mothers and two daughters,how many people at least are there?
IQ

意思是:这里有两个母亲和两个女儿,那么这里最少有几个人?
The answer is three,a daughter,a mother and a grandma
答案是3个 一个女儿 一个母亲 一个祖母

3个,外孙女,女儿,母亲。
外孙女和女儿算是两个女儿,女儿和母亲算是两个母亲

There are at least three people: a grandmother, a mother, and a daughter (since the mother can count as both a mother and a daughter)