Quantitative Aptitude - Arithmetic Ability Questions

If 5/6th of 7/6th of a number is 140, then 9/4th of that number is

In a test, Charan secured 54 marks that was also equivalent to obtaining 72% marks. How many marks was the test out of?

If 3x^2 + ax + 4 is perectly divisible by x - 5, then the value of a is :

If cos 240° = x, then value of x is

Determine the value of y-1y2 when y4+1y4=34

The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number?

If tan(A/2) = x, then the value of x is

A boy in a train notices that he can count 31 telephone posts in 60 seconds. the distance between two posts is 60 meters. Calculate the speed of the train?