Can you write down eight eights so that they add up to one thousand?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Name a key which is hardest to turn.

Can you count the number of quadrilaterals in the picture below?

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

Why is the longest human nose just 11 inches?

What's a single-digit number with no value?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?