Quantitative Aptitude - Arithmetic Ability Questions

Select the odd word/letters/number/number pair from the given alternatives.

What is the mean of the first five Triangular Numbers?

ABC is a right angled triangle with angle A = 90 deg. Then the value of cos2A+cos2B+cos2C is

Select the odd letters from the given alternatives.

The upper part of a tree broken over by the wind make an angle of 60 deg with the ground. The distance between the root and the point where top of the tree touches the ground is 25 metres. What was the height (in metres) of the tree?

If 1/√(1 + cot2A) = x, then value of x is

What is the value of a-b when a2+b2-6a-6b+18 = 0 ?

The factors of x2 + 8x + 12 are