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

Be active and find the killer in the picture Riddle below.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What breaks yet never falls, and what falls yet never breaks?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Which digit occurred maximum times between the number 1 and 1000?

Why is the Hole below a Lock?

A dead body is found outside a multi-story multinational company. The case is reported and a homicide detective is called on the crime scene.

He looks at the body and then towards the building. From the position of the body, it is evident that the victim committed suicide. He goes to the first floor of the building and then walks in the direction of the dead body, opens the window and toss a coin in the air.

He goes to second floor and again repeats the process. He keeps doing this till he is done on all the floors. Then he returns back to the floor and tells his team that it is a murder.

How in heaven did he deduce that?

What work can one never finish?