Can you fill the blank with the correct number?

6 30 870 756030 _____

Find the value of "?" in the ball picture Riddle below:

What is the next number in this matchsticks series riddle?

Can you decipher the below rebus?

PBLUESAISNUERSES

What is always in front of you but can’t be seen?

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Can you find the missing piece of the Porsche?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can anyone tell me a word in the English dictionary which has a silent 'z'?