2, 3, 5, 9, 17, _ What is the next number in the sequence?

How many letters are in the alphabet?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Spot 5 differences in two Christmas tree below:

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

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?