Quantitative Aptitude - Arithmetic Ability Questions

What is the area (in sq cm) of a circle whose circumference is 26.4 cm?

If x = 93 , y = 93 , z = 94 then the value of x2 - y2 + 10xz + 10yz is

If a - b = -1 and ab = 6, then what is the value of a3- b3?

What is the slope of the line, parallel to the line 3x -­ 6y = 4?

XYZ is a right angled triangle and ∠Y = 90°. If XY = 2.5 cm and YZ = 6 cm then the circumradius of ∆XYZ is

If a + b = 10 and ab = 21, then the value of (a - b)2 is

If the length of the side of an equilateral triangle is 8 cm, what is its area?

∆DEF is right angled at E. If cosD = 5/13, then what is the value of tanF?