Replace the question mark with the correct number.

Can you Find and name the hidden bird in the picture below ?

What goes up but never comes down?

The pound is not a finish.

We are sharing a few instructions below, which you have to use in any suitable order to modify the above sentence such that the end sentence is a scientific fact.

- Eliminate a letter and supplement another in its place.
- Take away one word.
- Remove one letter from one word.
- Get rid of two letters from one word.
- Swap a word with its antonym.

If an electric train is travelling south, then which way is the smoke going?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Which alphabet is a part of our body?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?