Quantitative Aptitude - Arithmetic Ability Questions

Two bottles contain acid and water in the ratio 2 : 3 and 1 : 2 respectively. These are mixed in the ratio 1 : 3. What is the ratio of acid and water in the new mixture ?

The maximum value of 5+20x-4x2, when X is real number

The least value of tan2x + cot2x is

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder

Reduce 3596 / 4292 to lowest terms.

P and Q can do a project in 60 and 30 days respectively. In how many days can they complete 90% of the project if they work together?

If cosθ1-sinθ+cosθ1+sinθ = 4, then the value of θ (0°<θ<90°)?

If θ is positive acute angle and 7cos2Ɵ + 3sin2Ɵ = 4, then the value of θ is