Which one of the following is not a borderline element?

Pipes A, B, and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hours, respectively, the third can drain the cistern, when filled, in 6 hours. If all the three pipes are opened simultaneously when the cistern is three-fifth full, how many hours will be needed to fill the cistern?

Who won the 2017 Women's Hockey Asia Cup held in Japan?

Who is the captain of the Indian men's volleyball team as of February 2018?

Which of the following sportspersons recently wrote the autobiographical book 'Ace Against Odds'?

A and B can complete a task in 12 days. However, A had to leave a few days before the task was completed and hence it took 16 days in all to complete the task. If A alone could complete the work in 21 days, how many days before the work getting over did A leave?

The velocity of light in vacuum is

Choose the correct figure to fill in the blank space.

     Problem Figure