The average age of a cricket team of 11 players is the same as it was 3 years back because 3 of the players whose current average age of 33 years are replaced by 3 youngsters. The average age of the new comers is: 

Which one of the following organisms has a role in converting nitrates to free nitrogen?

The branch of study dealing with old age and aging is known as _. 

(DIRECTIONS 19): In the following questions, you have brief passages. Read the passages carefully and choose the best answer to each question out of the four alternatives.
Indian airlines had no positive response to the incident occurred in the failure of aeroplane engine.It was 1989 ,Indian airline B059 got crashed in the middle of the Indian ocean,205 passengers were died.There were no clues about the B059 , some says that it got crashed but some said it got lost.Passengers relative were worried about their dear ones. Government decleared the issue of B059 as a priority,Indian navy were given responsibility to find the B059 but nothing was found .After a year some fishermen found the black box of B059, which confirms about the crash of Indian aeroplane B059 due to engine failure.
What could be assumed from the passage?

What is called, a concentric circle on a disk?

The equidistant point from the vertices of a triangle is called its: 

Directions: Study the following arrangement carefully and answer the questions given below—
1 R Z T 4 A 9 $ D F 1 U # B # 8 H I © X M H 3 2 P $ 5 N P 6 D

Which of the following is the fourth to the left of the twelfth from the left end?