What do you call a fish without an eye?

What number should come in place of the question mark below?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Find out the number of circles in the given picture having Illusion

I know a nine-letter word having only one vowel.
Do you ?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?