###Human: Elvis and Ralph are to make square shapes with matchsticks from a box containing 50 matchsticks. Elvis makes 4-matchstick squares and Ralph makes 8-matchstick squares. If Elvis makes 5 squares and Ralph makes 3, how many matchsticks will be left in the box?, ### Assistant: Elvis makes 5 squares with 4 matchsticks each for a total of 5*4 = 20 matchsticks
Ralph makes 3 squares with 8 matchsticks each for a total of 8*3 = 24 matchsticks
They used a total of 20+24 = 44 matchsticks
There will be 50-44 = 6 matchsticks left in the box 
 So the answer is :  6