Who is that with a neck and no head, two arms and no hands? What is it?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?