Can you find out the total number of triangles in the given figure?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

If eleven plus two equals one, what does nine plus five equal?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

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?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?