Quantitative Aptitude - Arithmetic Ability Questions

If 4/5th of 6/7th of a number is 216, then 8/9th of that number will be

Three toys are in a shape of cylinder, hemisphere and cone. The three toys have same base. Height of each toy is 2√2 cm. What is the ratio of the total surface areas of cylinder, hemisphere and cone respectively?

x and y are two numbers such that their mean proportion is 9 and third proportion is 243. What is the value of x and y?

Two water-squash mixtures, the first having a water-to-squash ratio of 4 : 1 and the other having a ratio of 3 : 1, are blended in the ratio 1 : 2. What is the water : squash ratio in the blend?

Of the 5 numbers whose average is 78, the first is 2/11 times the sum of other 4. The first number is

Average of two numbers is 8 and average of other three numbers is 3 ; the average of the five numbers 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.