Quantitative Aptitude - Arithmetic Ability Questions

In a mixture of 25 litres, the ratio of milk to water is 4:1. Another 3 litres of water is added to the mixture. The ratio of milk to water in the new mixture is

If y=2secθ and x=3tanθ then x29-y24 is

Two fractions are such that their product is ­4 and sum is ­32/15. Find the two fractions.

The sum of three consecutive even numbers is 42. Find the middle number.

What is the value of [(cos 3θ + 2cos 5θ + cos 7θ)÷(cos θ + 2cos 3θ + cos 5θ)] + sin 2θ tan 3θ?

What is the simplest form of (1 + cosA)(cosecA ­ cotA)?

What is the perimeter of the sector whose central angle is 60° and radius of the circle is 21 cm?

What is the highest common factor of 360 and 450?