Quantitative Aptitude - Arithmetic Ability Questions

In a week, how many times are the hands of a clock at right angles with each other?

What is the slope of the line perpendicular to the line passing through the points (-5 , 1) and (-2 , 0)?

Points P and Q lie on side AB and AC of triangle ABC respectively such that segment PQ is parallel to side BC. If the ratio of AP:PB is 2:5, and area of Δ APQ is 4 sq cm, what is the area of trapezium PQCB?

If P + 1P+2 = 1, then the value of P+23+1P+23-3 ?

If cos 240° = x, then value of x is

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

Four pairs of words are given. Find the odd one out.

Find the value of 'a' for which x+3x+a24 is a perfect square.