Quiz: Mary’s Dad Has 5 Daughters – Who’s the 5th Daughter?

Here’s a classic brain teaser that’s sure to make you stop and think:
Mary’s dad has 5 daughters: Cha Cha, Chi Chi, Che Che, Cho Cho. So who’s the 5th daughter?

At first glance, it seems like this question is trying to trick you with a pattern in the daughters’ names. But the answer is right in front of you!

The Answer: The 5th Daughter is Mary!

Yes, that’s right—Mary is the 5th daughter! The answer is hidden in the question itself. The question starts by telling you that Mary’s dad has 5 daughters, and then lists four of them: Cha Cha, Chi Chi, Che Che, and Cho Cho. The 5th daughter, by logical deduction, has to be Mary.

Why This Question Tricks People

This riddle is a great example of how our brains can get distracted by patterns. In this case, you see a list of names all following a similar pattern: Cha Cha, Chi Chi, Che Che, Cho Cho. Naturally, your mind starts looking for another name that fits the pattern—something like Chu Chu or Cha Cha Cha.

But the real trick is in the phrasing of the question. The answer isn’t part of the pattern at all—Mary is already given as the 5th daughter. It’s easy to overlook this because we’re so focused on trying to find something that fits with the other names.

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