Quantitative Aptitude - Arithmetic Ability Questions

If a2+1a2 = 38, then find the value of a-1a?

The value of cos (1110°) is

There is 40% increase in an amount in 8 years at simple interest. What will be the compound interest of Rs. 10000 after 3 years at the same rate?

In triangle PQR, A is the point of intersection of all the altitudes and B is the point of intersection of all the angle bisectors of the triangle. If ∠PBR =105°, then what is the value of ∠PAR (in degrees)?

An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computing each of the remaining problems is

The fraction from the ones listed below that will NOT lead to a recurring decimal is

What is the altitude of an equilateral triangle whose side is 12 cm?

How many numbers divisible by 125 can be written by using all the digits 2,3,8,7,5 exactly once?