Quantitative Aptitude - Arithmetic Ability Questions

Ram lent Rs. 6,000/- to Shiva for 3 years and Rs. 8,000/- to Krishna for 5 years at the same rate of simple interest per annum. He got a total interest of Rs. 5,220 from both. Find the rate of interest per annum.

If x + y = 10 and xy = 4, then what is the value of x4 + y4?

Determine the value of z in the equation: z = 20+20+20+20+...∞

If x1/4 + x-1/4 = 2, then what is the value of x81 + (1/x81)?

By selling 175 pineapples, the gain is equal to the selling price of 50 pineapples. What is the gain percentage?

A school has 8 periods of 45 minutes each, every day. How long will each period be if the school has to have 9 periods everyday, assuming the working hours to be the same?

X and Y undertook to do a piece of work for Rs 5400. X alone could do this work in 18 days and Y alone could do this work in 24 days. With the assistance of Z they finished the work in 8 days. What is the share (in Rs) of Z?

A solid cone of height 24 cm and radius of its base 8 cm is melted to form a solid cylinder of radius 6 cm and height 6 cm. In the whole process what
percent of material is wasted?