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

What Word am I Looking For ?

Imagine you are in a room with no windows or doors. How will you get out?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

There are forty elephants and they have forty-fore heads. How can this be possible?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

You can hear me, but you can't touch or see me.

What am I?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.