When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

Solve this riddle by finding the odd one out from the rest.

Some friends went on a vacation to a resort. It was raining heavily and it kept raining for thirteen days.

When it rained in the morning, the afternoon was beautiful and when it rained in the afternoon, the day was blessed with a clear morning.

Overall, the friends experienced eleven nice mornings and twelve nice afternoons. Can you find out the number of days they spent on vacation?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

what does this picture(rebus) riddle means ?