What is the word or phrase?

Can you replace the question mark with the correct number in the below table sequence?

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 ?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Can you find the missing piece of the Porsche?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Bay of Bengal is in which state?