Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Find the hidden tiger in the given optical illusion ?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

What has many teeth, but cannot bite?

Name a key which is hardest to turn.

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

Can you replace the question mark with the correct number?

Why are televisions attracted to people?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?