What is the next number in this matchsticks series riddle?

They are three errirs in this question. Can you find them?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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 ?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What Does this text mean:

important=important

What does Alexander the Great and Winnie the Pooh have in common?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?