Quantitative Aptitude - Arithmetic Ability Questions

The value of x for which the expressions 15 ­ 7x and 15x + 7 become equal is _____.

If 2cosAsinB = x, then the value of x is?

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?

The ratio of three numbers is 5 : 6 : 8. If the sum of the three numbers is 380, then what is the smallest among the three numbers?

The bus fare between two cities is increased in the ratio 25:29. Find the increase in the fare, if the original fare is Rs. 625

Anil can do a piece of work in 14 days which Rohit can do in 21 days. They worked together for few days after which Anil left. If Rohit worked alone for 3 days, find the total number of days it took to complete the whole work.

α and β are the roots of the quadratic equation x2 – x – 1 = 0. What is the value of α8 + β8?

Two trains, one 150 m long and the other 130m long, coming from opposite directions crosssed each other in 7.2 seconds. The sum of speed of the two trains every hour would then be