Which is faster, Heat or Cold ? Explain.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

With the help clues provided in the image, can you find the 5 digit key?

A blonde put eyeliner on her head. Why?

What has one eye, but can’t see?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

I have eight fingers and two thumbs but I do not live. What Am I?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?