Information

Einstein's disciples

Einstein's disciples

They say that by asking Albert Einstein about the number of disciples he had, he answered the following:

Half of them study math, a fourth physical, a seventh is silent and there are also three women.

How many disciples did Einstein have?

Solution

If we call X to the number of disciples, we can deduce the following equation from the statement:

Where do we deduce that he had X = 28 disciples.