What has one letter and starts with an E?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Identify The phrase in the picture.

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Next Number in the Series,

5, 16, 49, 104, ?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

When 99 is considered higher than 100?