What Adam and Eve do not have but the rest of the people have?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

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

? : 3839 :: 11 : 1209

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

O_er_t_o_

Complete the missing letters of the given word.

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.