Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

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?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

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

What is it?

Bay of Bengal is in which state?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What jumps when it walks and sits when it stands?

Move three sticks of the spiral below to form a square.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Decode below rebus
D
N
A
T
S , D