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sot singapore cheryl birthday problem_00002223
sot singapore cheryl birthday problem_00002223

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    'Cheryl's birthday' stumps people across the globe

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'Cheryl's birthday' stumps people across the globe

A problem from a Singapore math exam has gone viral and is stumping people all over the world. CNN's Isha Sesay has the story and the solution.

'Cheryl's birthday' stumps people across the globe

A problem from a Singapore math exam has gone viral and is stumping people all over the world. CNN's Isha Sesay has the story and the solution.