Quantitative Aptitude - Arithmetic Ability Questions

A solid sphere and a solid hemisphere have the same total surface area. The ratio of their volumes is (Take, π=22/7)

If in a two digit number, the digit at unit place is y and the digit at tens place is 5, then the number is

Find the greatest number which on dividing 1580 and 3800 leaves remainders 8 and 1 respectively.

The average of three numbers is 6. The average of the first two is 5 while the average of the last two is 8. The three numbers are:

In a class when a test is conducted, mean of 25 students marks is 60 if mean of first 13 students marks is 70 and mean of last 13 students marks is 50 find the marks of the middle student when arranged in the ascending order.

If 7 spiders make 7 webs in 7 days , then 1 spider will make 1 web in how many days ?

If O is the centre of a circle of radius 5 cm. At a distance of 13 cm from O, a point P is taken. From this point, two tangents PQ and PR are drawn to the circle. Then , the area of quadrilateral PQOR is

The diagonal of a square is equal to the side of an equilateral triangle. If the area of the square is 15√3 sq cm, what is the area of the equilateral triangle?