Quantitative Aptitude - Arithmetic Ability Questions

What is the mean of the first five Triangular Numbers?

4*(-­0.1(5.5 + 8.5)) of 0.5 = ?

Incentre of Δ ABC is I. ∠ABC = 90° and ∠ACB = 70°. ∠AIC is

Two mixtures have milk and water in the ratio 1 : 4 and 3 : 2 respectively. In what ratio two types of mixtures have to be mixed to get a new mixture having ratio of milk and water as 1 : 1?

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?

A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is

What is the value of Cot 60 - Sec 30?

If (sinA + CosA)/(sin A - cos A) = 5/4, the value of (tan2A + 1)/(tan2A - 1) = ?