How can you write nineteen in a manner that if we take out one, it becomes twenty?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

I shave every day, but my beard stays the same. What am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

What is the word or phrase?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?