What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Rearrange the letters in "new door" to make one word.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

I am an odd number. Take away a letter and I become even. What number am I?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Can you solve this picture maths equation?