Find the hidden tiger in the given optical illusion ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

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

What question can you never answer yes to?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Solve the following series:
AZ, GT, MN, __, YB

If a wheel has 54 spokes, how many spaces are there between the spokes?