Find out the missing number in the picture attached:

Find the missing number in the sequence below:

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?

Solve the mathematical equation in the picture below.

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

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

? : 3839 :: 11 : 1209

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Can you solve below mathematical equation?

2^1234 - 2^1233