Mathematical puzzles

Puzzles, situation puzzles and recreational mathematics.

situation puzzles and recreational mathematics. Neuron juice
 
 
 

Neuron juice.

The important thing is not to stop questioning. (Albert Einstein.)

  

12.- A milkman has a jug of 8 liters full of milk, and two more of 5 and 3 liters.

A customer asks for exactly 4 liters.

How can he calculate 4 liters and give it to the customer in the 5-liter jug?

 

-- Solution of the riddle --