Quantitative Aptitude - Arithmetic Ability Questions

The volume of a spherical balloon is increased by 700%. What is the percentage increase in its surface area?

Find the square root of 1485961

A does 50% of a work in 12 days. He then calls in B and they together finish the remaining work in 8 days. How long B alone would take to complete the whole work?

Determine the value of  'a' which satisfies the equation 9a + 40a = 41a

Badki can bake 45 cakes in 9 hours, Badki and Chutki together can bake 80 cakes in 10 hours. How many cakes Chutki can bake in 40 hours?

Nine years later, age of B will be equal to the present age of A. Sum of A's age 3 years later and B's age 4 years ago is 76. If C is half of the present age of B, then what will be C's age (in years) after 10 years?

A bank offers 5% compound interest per half year. A customer deposits Rs. 3200 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is:

ABCDEF is a regular hexagon of side 12 cm. What is the area (in cm2) of the triangle ECD?