Quantitative Aptitude - Arithmetic Ability Questions

The standard deviation of the set {10, 11, 12, 9, 8} is

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the

Rearrange the jumbled up letters in their natural sequence ad find the odd one out.

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?

What is the ratio of radius of incircle and circumcircle for an equilateral triangle with an area of 22√3 sq. units?

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

What is the area (in square units) of the figure enclosed by the x-axis, the y-axis and the line x + 2y = 6 ?