Quantitative Aptitude - Arithmetic Ability Questions

If x + y + z = 0, then what is the value of (3y2 + x2 + z2 )/(2y2 – xz)?

874.96 + 94.0091 × 34.98 –1244.98 = ?

A sum of Rs 8000 is divided into two parts. The simple interest on first part at the rate of 21% per annum is equal to the simple interest on second part at the rate of 35% per annum. What is the interest (in Rs) of each part?

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

The length and breadth of a rectangle are 24 cm and 7 cm respectively. Calculate its perimeter (in cm).

If 123 x 356 = 43788, then 1.23 x 0.356 = ?

In ∆DEF measure of angle E is 90°. If secD = 25/7, and DE = 1.4cm, then what is the length (in cm) of side DF?

What number should be added to each of the numbers 55, 100, 65 and 116, so that the resulting numbers are in continued proportion?