Quantitative Aptitude - Arithmetic Ability Questions

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 49π sq cm?

P, Q and R are channels which discharge solutions A,B and C respectively in a tank. When the tank is empty and all the three channels are opened what is the proportion of the solution C in the tank after 3 minutes, if the channels P, Q and R can fill the tank from empty to full in 30 minutes and 20 minutes and 10 minutes respectively when they are opened one at a time.

The simple and compound interest that can be earned in two years at the same rate is Rs 1,000 and Rs 1,040 respectively. What is the rate (percent per annum) of interest?

The simple interest on a certain sum of money invested at a certain rate for 2 years amounts to Rs. 1200. The compound interest on the same sum of money invested at the same rate of interest for 2 years amounts to Rs. 1290. What was the principal?

Find 2 consecutive natural numbers, sum of whose squares is 25.

The radius of a cylindrical milk container is half its height and surface area of the inner part is 616 sq.cm. The amount of milk that the container can hold, approximately, is [ Use : √5 = 2.23 and π = 22/7 ]

Find out the odd word/letters/number/number pair from the given alternatives.

If 5x/2 - [7(6x - 3/2)]/4 = 5/8, then what is the value of x?