Quantitative Aptitude - Arithmetic Ability Questions

In a bag the ratio of red balls to green balls is 4 : 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 : 3. How many red balls are there in the bag?

What is the area (in sq cm) of a circle whose circumference is 22 cm?

tan3A is equal to

The marked price of a pen is Rs 3000. The shopkeeper gives two successive discounts of 15% and a% to the customer. If the customer pays Rs 2142 for the pen, then what is the value (in percentage) of a?

What is the difference of the cube and square of the common root of (x2 – 8x + 15) = 0 and (y2 + 2y – 35) = 0?

Which one of the following is the minimum value of the sum of two integers whose product is 24?

If 177 is divided into 3 parts in the ratio 1/2 : 2/3: 4/5, then the second part is

If y=2-x1+x, then what is the value of 1y+1 + 2y+1y2-1 ?