What is the longest word in the dictionary?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A pregnant woman is preparing to name her seventh child. Her children's names so far are Dominique, Regis, Michelle, Fawn, Sophie, and Lara. What will she name her next child -- Jessica, Katie, Abby or Tilly?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

The centre of the third figure is empty. What digit should fit inside?