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

What is it?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What always comes into a house through the keyhole?

Find the hidden tiger in the given optical illusion ?

If 21x = 79x, what is the value of x?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Can you identify if it's a murder or a suicide ?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.