Quantitative Aptitude - Arithmetic Ability Questions

What is 0.53 + 0.53equal to ?

A fraction is greater than its reciprocal by (72)/(77). What is the fraction?

In the given figure, AB is a diameter of the circle with center O and XY is the tangent at a point C. If ACX = 35 deg, then what is the value (in deg) of CAB?

If A : B = 1 : 4 and B : C = 2 : 3, then what is A : B : C?

Solve the following equation to find x: (x − 2)2 − 36 = 0 : xεN

In a triangle PQR, PX, QY and RZ be altitudes intersecting at O. If PO = 6 cm, PX = 8 cm and QO = 4 cm, then what is the value (in cm) of QY?

If a + b + c = 9 and ab + bc + ca = 18, then what is the value of a3 + b3 + c3 – 3abc?

The weights of two iron balls are 3.5 kg and 7.5 kg. What is the percentage weight of the 1st ball with respect to 2nd ball.