Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 2 - 2z + z22 + 2z - z2, when z+2z = 2 ?

In a Rhombus ABCD, measure of angle CAB is 25°, what is the measure of angle ABC?

From a point P on a level ground , the angle of elevation to the top of the tower is 30° . If the tower is 100m high , the distance of point P from the foot of the tower is ( Take √3 = 1.73)

For triangle PQR, find equation of altitude PS if co­-ordinates of P, Q and R are (6,2), (0,3) and (­-4,5) respectively?

If a = 3+23-2, b = 3-23+2 then a2+b2-ab ?

What is the value of {sin (90 – x) cos [π – (x – y)]} + {cos (90 – x) sin [π – (y – x)]}?

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

Working 5 hours a day, Shivam can read a book in 24 days. How many hours a day should he work so as to finish the same work in 8 days?