Quantitative Aptitude - Arithmetic Ability Questions

If the circumference of a circle is 44 cm, then what must be its area (in cm²)?

If x + y = 3, then what is the value of x3 + y3 + 9xy?

The difference between the largest and the smallest angles of a triangle whose angles are in the ratio of 5:3:10 is

A boat is sailing towards a lighthouse of height 20√3 m at a certain speed. The angle of elevation of the top of the lighthouse changes from 30° to 60° in 10 seconds. What is the time taken (in seconds) by the boat to reach the lighthouse from its initial position?

Total surface area of a cube is 486 sq cm, find sum of length of all its edges?

If the areas of two similar triangle are in the ratio 5 : 7, then what is the ratio of the corresponding sides of these two triangles?

A sum of money invested for 2 yrs and 9 months at the rate of 8% simple interest per annum became Rs.732 at the end of the period. What was the sum that was initially invested?

When a number x is divided by a divisor it is seen that the divisor = 4 times the quotient = double the remainder. If the remainder is 80 then the value of x is