81 x 9 = 801. What must you do to make the this equation true?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Keyboard words are not in alphabetical order, Why?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

It belongs to you, but other people use it more than you do. What is it?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

What has 13 hearts but no other organs?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?