Quantitative Aptitude - Arithmetic Ability Questions

The area of an equilateral triangle is 9√3 sq cm, find its perimeter?

The length and breadth of a rectangle are 24 cm and 7 cm respectively. What must be the length of its diagonal (in cm)?

In ΔABC , DE || AC. Where D and E are two points lying on AB and BC respectively. If AB = 5 cm and AD = 3 cm, then BE : EC is

A can do a piece of work in 20 days and B in 15 days. With help of C, they finish the work in 5 days. C can alone do the work in

If x + (1/x) = √13, then what is the value of x5 – (1/x5)?

In what ratio tea at Rs 240/kg should be mixed with tea at Rs 280/kg so that on selling the mixture at Rs 324/kg there is a profit of 20%?

By selling a table for Rs. 16,870, a shopkeeper suffers a loss of Rs. 1080. His loss percentage (rounded off to one decimal place) is

If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?