Talk:Watcher's Keep Final Seal/@comment-64.231.235.27-20200219043806/@comment-81.53.48.249-20200219055403

"I have as many brothers as sisters, but my brothers have twice the number of sisters as brothers. How many children do my parents have?"

Below, "Females" means the amount of female kids my parents have, and "Males" means their amount of male kids.

If I am male, we have this system derived from the first sentence of the riddle:

Females = Males - 1 Females = 2 x (Males - 1)

The -1 is there because, in the first equation, I have (Male kids - 1) brothers since I am male. In the second equation, it is because my brothers are males, therefore each of them has (Male kids - 1) brothers, just like me.

This system has one solution: There's one male (me) and no female. I have no brother or sister. You can tell that's not the answer they expect, so I am female. If I am female, we get this system instead:

Males = Females - 1 Females = 2 x (Males - 1)

The first equation acknowledges that I am female, in the same fashion as earlier. I have (Female kids - 1) sisters. The second equation is the exact same as earlier because my gender is not involved, it's about my brothers' brothers. Anyway the system resolves to:

Females = 4 Males = 3

My parents have seven kids.