Why Our Brains Instantly Get It Wrong
The moment we see “born in 1975,” our brain does something automatically.
It assumes:
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1975 is a year
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The woman was born in that year
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Therefore, her age must be calculated from that point forward
This assumption feels so natural that we don’t even realize we’re making it.
But riddles thrive on assumptions.
And this one is built entirely around a single word that we never stop to question.
The Key Word Everyone Overlooks
That word is:
“In.”
“This woman was born in 1975.”
We assume “1975” refers to a year because that’s how we normally talk about birth dates. But the riddle never actually says 1975 is a year.
It just says she was born in 1975.
That tiny ambiguity is the entire trick.
The Answer (Don’t Peek Too Soon)
Here’s the solution:
She was born in Room 1975.
Or:
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Hospital room 1975
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Apartment number 1975
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House number 1975
The number 1975 refers to a location, not a year.
Once you see it, the riddle instantly makes sense—and you’ll probably groan a little, because the answer feels obvious in hindsight.
She can absolutely be 20 years old if “1975” isn’t a date at all.
