Quantitative Aptitude - Arithmetic Ability Questions

Find the sum of interior angles of a dodecagon?

Coefficient of x2 in (x + 7)(5 - 3x)(3x - 6) is

Find the value of '?' in 512 × 125 ÷ 15625 = 3125 × 25?

A mixture contains spirit and water in the ratio of 3 : 2. If it contains 3 litres more spirit than water, the quantity of spirit in the mixture is

7 litres mixture of milk and water contains 30% water. 3.5 litres of milk is added to this mixture. What is the percentage of water in the new mixture?

If tanθ + cotθ = 5, then the value of tan2θ + cot2θ is

If a - b = 3 and a2+b2=25, then the value of ab is

A train travelling at 76 kmph crosses a 450 m long platform in 27 seconds. What is the length of the train?