In which direction should the missing arrow point?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

No matter how little or how much you use me, you change me every month. What am I?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?