Using Only Five 5's and any mathematical operator make sum as 37

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Trying to tease Birbal, Akbar gave him one gold coin and ask him to buy
* something for him to eat
* something for him to drink.
* something to feed the cows
* something to plant in the garden
and most important you need to buy only one thing.

What must Birbal buy to silence Akbar?

Can you find a rabbit in the given picture?

I have eight fingers and two thumbs but I do not live. What Am I?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What two things can you never eat for breakfast?