Solve this riddle by finding the odd one out from the rest.

How many sides does a circle have?

What is the below Rebus indicate?

When can we add 2 to 11 and get 1 as the correct answer?

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

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

What has lots of eyes, but can’t see?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

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 ?