What does this rebus puzzle means ?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

When is the top of a mountain similar to a savings account?

It is always ahead of me yet I can never see it. What is it?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What's a single-digit number with no value?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Solve the equation in the image by looking at the pattern closely.