Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What has no start, end, or centre?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Count the number of triangles in the below picture?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?