In a stack of boards at a lumber yard, the 20th board counting from the top of the stack is immediately below the 16th board counting from the bottom of the stack. how many boards are in the stack?

There are 34 boards in the stack

Step-by-step explanation:

So, when solving this problem, you need to first build a diagram like the one on the attached picture. There you can see the graphical representation of the given problem.

So, we know that the 16th board from top to bottom is immediately above the

20'th board from up to down. This means that the board immediately below the 20'th board from up to down is the 14th board.

This gives us an answer of 14+20=34

Which is the answer. That is represented in the second diagram.