Quantitative Aptitude - Arithmetic Ability Questions

If X=32, then the value of 27x3-54x2+36x-11 is

A machine depreciates in value each year at the rate of 10% of its previous value. However, every second year there is some maintenance work so that in that particular year, depreciation is only 5% of its previous value. If at the end of the fourth year, the value of the machine stands at Rs 1,46,205, then find the value of machine at the start of the first year.

What is the fourth proportional to 24, 120 and 22?

If (x/5) + (5/x) = – 2, then what is the value of x3?

Δ DEF is right angled at E. If m∠D = 45°, then what is the value of cosecF X cotD?

The price of an article is cut by 42%, to restore to its original value, the new price must he increased by ______.

A certain sum of money becomes 4 times of itself in 30 years at a rate of simple interest. In how many years it will become double of itself at the same rate of simple interest?

A vendor buys 12 bananas for Rs 60 and sells 5 bananas for Rs 32. What will be his gain (in %)?