Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Can you solve the below tricky visual equation?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

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 ?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Can you count the number of triangles in the given figure?

Can you decipher the two rows to find the hidden word?

Replace the question mark in the picture below.

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?