Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

When 99 is considered higher than 100?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Find the next number in the sequence

5 12 24 36 ?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?