Can you find out who is the kidnapper in below Picture and why, Explain ?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

Find the value of "?" in the ball picture Riddle below:

What is the next number in the series?

15 29 56 108 208 ?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

I am white when I am dirty, and black when I am clean. What am I?