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MATH / Mary and Jenna are playing a game in which each girl rolls a twenty-sided die…

Problem

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problem

Mary and Jenna are playing a game in which each girl rolls a twenty-sided die with numbers from 1 to 20 on the faces.  If the number on the die that Mary rolls is a factor of the number on the die that Jenna rolls, Mary wins.  If the number on the die that Jenna rolls is a factor of the number on the die that Mary rolls, Jenna wins.  For how many possible rolls would both girls win?

level

Level 4

type

Prealgebra

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Source and history

Official source

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