What goes up but never comes down?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

How many letters are in the alphabet?

Count the number of triangles in the given picture.

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

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?