Saturday, January 13, 2018

Mixture of Coffee and Tea

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. 

At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea. 

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee ?

Skip to the answer! 


1 comment:

Jude Salles said...

Not sure I got it.
It seems that in the end, the concentrations are different but the volumes are equal.
Because from the tea cup you took out a teaspoon and returned a teaspoon.
Thus no change in volume.
And using your numbers, the teacup is short 70 molecules of tea.