Jack said to Martha "YOUR ONLY BROTHER'S SON IS MY WIFE'S BROTHER". How is Martha related to Jack's wife?

Bob walks 8km towards North and turns to his right and walks 4km more. He then turns to his right and walks 5km and turns again to his right and walks another 4 km. Here he meets Smith coming from the opposite direction. They both stop here. If Bob is to again reach the point from where he started, in which direction will he have to go from the point he's standing?

Two siblings: A and B, are having a conversation. Read the following information and answer the given question: A says to his sister, B: 'I have as many sisters as brothers.' B tells her brother, A: 'I have twice as many brothers as sisters.' How many brothers and sisters are there?

Count the number of triangles in the given diagram

Damon is running 80m towards the west, then he turned left and walked 10m, then he turned to the left and went 10m and then turned left again and went 10m. How far is Damon from the starting point?

In a game, Peter places seven marbles adjacently in a row. Two marbles are red in color. Two blue colored marbles are adjacent to the same red marble. There is one pink colored marble. There are two white colored marbles but they are not placed adjacent to each other. One of the red colored marbles is place at one end of the row. If the pink colored marble is placed at the other end of the row, where is the second red colored marble?

What is the total number of triangles in the given diagram?

Suppose there is a group of 5 people P, Q, R, S, and T. Information about these 5 persons is as follows:  Among them one is cricketer, one is Hockey player, and one is football player.  P and S are unmarried women in the group and do not take part in any game.  None of the women plays Hockey or Cricket.  There is a married couple in the group. T is the husband.  Q is the brother of R and is neither a hockey player nor a football player. Based on the given information, who is the Football player in the group?

Peter places seven marbles in a row according to the following information.  Two marbles are red in color.  Two blue-colored marbles are adjacent to the same red-colored marble.  There is one pink-colored marble.  There are two white-colored marbles but they are not placed adjacent to each other.  One of the red-colored marbles is placed at one end of the row. If the pink-colored marble is placed at the other end of the row, then the marble of which color will be placed in the center of the row?

There are five friends: A, B, C, D and E who pursue five different professions: singer, lawyer, doctor, sportsman and chef, not necessarily in the same order. One day, they meet and discuss their respective earnings. E is earning as much as the singer. C is earning less than the lawyer. A is earning less than the doctor. B is earning more than the chef. C is earning more than the doctor. The doctor is earning more than the sportsman. E is earning more than B. Based on the above information, what is A's profession?

This question is based on the following sequence: aABLJ1238YZM957QRF If second half of the sequence is reversed, which character will be at the 4th position from right?