Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Keyboard words are not in alphabetical order, Why?

Count the number of triangles in the below picture?

Why is a river so rich ?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Find the number of squares in the below-given picture.

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?