مادربزرگی ودخترش هر کدام سه تا دختر دارند. هر کدام از آنها یک برادر دارند . در کل چند نفر می شوند ؟
The grandmother and her daughter each have three daughters, each of them has one brother.
How many people are there in total
Nan iq test
Nan iq test