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Mathematics, 19.02.2020 02:53 kookycookiefanx

My classmate sent me this, apparently it's some sorta puzzle. Does anyone know the answer?

1 = 1
13 = 10
66 = 48
100 = ?

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Answers: 1

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My classmate sent me this, apparently it's some sorta puzzle. Does anyone know the answer?
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