What number do you get when you multiply all of the numbers on a telephone's number pad?

What has to be broken before you can use it?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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 is the riddle which can be asked all day with a different correct answer each time.

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

why number 8549176320 is one of a kind?