What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

What goes up but never comes down?

What does a man do only once in his lifetime, but women do once a year after they are 29?

I have no life, but I can die. What am I?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

I make two people out of one. What am I?

How many triangles are there on the puzzle below?

Can you count the number of triangles in the given picture?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

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.