What does this rebus puzzle means ?

How many letters are in the alphabet?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

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

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

The more of this there is, the less you see. What is it?

What have one eye but still cannot see?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?