Quantitative Aptitude - Arithmetic Ability Questions

If a = √2 + 1 and b = √2 - 1, then the value of 1a+1+1b+1 will be

A line cuts two concentric circles. The lengths of chords formed by that line on the two circles are 4 cm and 16 cm. What is the difference (in cm2) in squares of radii of two circles?

A solid has 12 vertices and 30 edges. How many faces does it have?

In a triangle PQR, S and T are the points on PQ and PR respectively, such that ST II QR and PS/SQ=3/5,PR =6cm, then PT is

In what ratio tea at Rs 240/kg should be mixed with tea at Rs 280/kg so that on selling the mixture at Rs 324/kg there is a profit of 20%?

Length and breadth of a rectangle are increased by 40% and 70% respectively. What will be the percentage increase in the area of rectangle?

If sinA = x, then x is equal to

The compound interest earned in two years at 15% per annum is Rs 20640. What is the sum invested (in Rs)?