I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

What is the riddle which can be asked all day with a different correct answer each time.

You can see it everyday, But cannot touch it at will. What is it?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you find a rabbit in the given picture?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

How many triangles are there in the picture below?