What has many keys but can’t open a single lock?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

Replace the question mark with the number below given a simple math problem.

Where do fish keep their money?

Which is the correct shadow of the bird?