What four weights can be used to balance from 1 to 30 pounds?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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 ?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?