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?

Rearrange the jumbled up letters in their natural sequence and find the odd one out.

What is the reflection of the point (2, -3.5) in the y-axis?

If the perimeter of a semicircle is 36 cm, then find its area (in cm2).

What is the value of tan 4π/3?

The co-ordinates of the centroid of a triangle ABC are (3,-2). What are the co-ordinates of vertex C if co-ordinates of A and B are (-2,5) and (6,-2) respectively?

A person driving at the speed of 40 kmph reaches office 1 minute early while he reaches 3 minutes late if driving at 36 kmph. What is the distance in km that she is covering?

What is the value of 5/9 + 7/8?