What has one letter and starts with an E?

What came first, the chicken or the egg?

If 1+9+8=1, what is 2+8+9?

A father's child, a mother's child, yet no one's son.

Who am I?

What will you call your mother's brother's brother-in-law?

Count the number of triangles in the picture below:

Count the squares in the matchstick puzzle below?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?