Replace the question mark with the number below given a simple math problem.

What begins with T, ends with T, and has T in it?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

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

Can you Find and name the hidden bird in the picture below ?

What has 88 keys?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?