Quantitative Aptitude - Arithmetic Ability Questions

The ratio of cost price and selling price 25:26. The percent of profit will be

The sum of a non-zero number and twenty times its reciprocal is 9. What is the number?

If (tanA + tanB)/(1 ­ tanAtanB) = x, then the value of x is

A shopkeeper marks up his wares by 60% and offers 10% discount. What will be the selling price (in Rs) if the cost price is Rs 7500?

sin(A+B) -­ sin(A-­B) is equal to

In ΔDEF measure of angle E is 90 deg. If sinD = 15/17, and DE = 4cm, then what is the length (in cm) of side EF?

If a-1a=1, then a2 + 1a2 ?

If sec θ (cos θ + sin θ) = √2, then what is the value of (2 sin θ)/(cos θ – sin θ)?