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

Why 1729 is a magic number? Answer Logically.

What jumps when it walks and sits when it stands?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

Can you write down eight eights so that they add up to one thousand?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I don't get anymore wetter, no matter how much rain falls on me.