John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

Solve the mathematical equation in the picture below.

Which is the rope you never skip with?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Prove that twice of ten is the same as twice of eleven.

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I shave every day, but my beard stays the same. What am I?

Can you name four days which start with the letter 'T'?