You need to arrange three 7 and mathematical symbols to form number 1?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

What's the only room from which no one can enter or leave

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

500 women soldiers are arranged in an array of ten rows and fifty columns in accordance with their respective heights. Now, the tallest woman from each row is asked to move out in the front. From them, the shortest one is labelled as Alpha. They are then asked to resume their original position.

Now, the shortest woman in each column is asked to come out in front. The tallest among them is labelled as Beta.

Can you find out if Alpha will be taller or Beta?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?