Quantitative Aptitude - Arithmetic Ability Questions

If x+1x = 4, then what is the value of x6+1x6 ?

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?

When Gopal walks from A to B and returns from B to A on cycle, then it takes him 46 minutes. By walking both ways, it takes him 75 minutes. If he rides cycle both ways then what will be the total time (in minutes)?

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

tan3A is equal to

If cosx.cosy + sinx.siny = -1 then cosx + cosy is

If w : 0.80 :: 9 : 6, w = ?

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