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How Many Doctors

Math brain teasers require computations to solve.

 

Puzzle ID:#43880
Fun:*** (2.29)
Difficulty:** (1.63)
Category:Math
Submitted By:fishmedAus******mod
Corrected By:fishmed

 

 

 



A group of doctors attended a conference. All but 40 were cardiologists. All but 50 were pediatricians. All but 60 were surgeons. These were the only types of doctors in attendance. How many in all attended the conference?

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