Base Age
Pro Problems > Math > Number and Quantity > Number Theory > BasesBase Age
Laura, who doesn't want people to know how old she really is, tells everyone that she is 21 years old, but she's not using base ten - she's using base n instead. Two years later she uses base n - 10 to tell people that her age is 133. How old was she really, when she said she was 21?
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Problem by malimil
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