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

What is the next number in this series?

4,12,84,3612....

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

How many letters are in the alphabet?

When it is alive we sing, when it is dead we clap our hands. What is it?

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?