Quantitative Aptitude - Arithmetic Ability Questions

The ages of A and B differ by 16 years. If 6 years ago, the elder one was 3 times as old as the younger one, find the present age of the younger between A and B?

The median of the data -3, 4, 0, 4, -2, -5, 1, 7, 10, 5 is

A mixture contains acid and water in the ratio of 7 : 3. If 4 litres of water is added to it, then the ratio of acid and water becomes 7 : 4. What is the quantity (in litres) of acid in the mixture?

If tanA = x, then x is

The sum of a non-zero number and twenty times its reciprocal is 9. What is the number?

An angle is 30 deg more than one half of its complement. Find difference between the greater and the smaller angles.

The angle subtended by the chord of length 10 cm is 120° at the centre. Calculate the distance of the chord (in cm) from the centre.

Consider the two similar triangles ABC and DEF. Which of the following is correct about the ratio of the area of the triangle ABC and DEF?