Quantitative Aptitude - Arithmetic Ability Questions

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

The diagonals do not form at least two congruent triangles in a _____.

What is the diameter (in cm) of a sphere of surface area 154 sq cm?

A train starts moving from a place X at 7:00 a.m. and arrives at another place Y at 1:00 p.m. on the same day. If the speed of the train is 15 m/s, then what will be the distance (in km) covered by the train?

If four angles of a quadrilateral are (6x-18), (80-4x), (4x+14), (12x-58), then find the value of the smallest angle of the quadrilateral.

Triangle PQR is such that PQ = 9 cm, QR = 6 cm, PR = 7.5 cm and triangle PQR is similar to triangle XYZ. If XY = 18 cm, find the value of YZ.

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

If 1/(1 + cosA) + 1/(1 ­- cosA) = x , then value of x is