Quantitative Aptitude - Arithmetic Ability Questions

Which of the following equations has 3 as a root?

The angles of elevation of the top of a temple, from the foot and the top of a building 30 m high, are 60° and 30° respectively. Then height of the temple is

A flask has two holes. The 1st hole alone makes the flask empty in 9 minutes and 2nd hole alone makes the flask empty in 16 minutes. If water leaks out at a constant rate, how long in minutes does it take if both the holes together empty the flask?

Some girls can do a piece of work in 18 days. In how much time (in days) two times the number of such girls will complete thrice of the work?

What is the value of sec 5π/4?

The two lines 4x+3y=0 and 7x+5y=0 will ______ in their graphical representation.

Select the odd letters from the given alternatives.

Choose the one which is odd from the following options