A zookeeper counted the heads of animal and found it to be 80. When he counted the legs of animals, he found the number to be 260. If the zoo had either Pigeons or horses, how many horses were there in the zoo ?

The speed of a boat is 10km per hour(kph) and the speed of the river current is 5 kph. The boat traveled 5 hou...

How many 1-inch square tiles would it take cover the floor of a closet that has dimensions 5 feet by 4 feet ?

2^30+2^30+2^30+2^30= ?

What must be added to 1/x for making it equal to x ?

If the difference between the circumference and diameter of a circle is 60 cm, then the radius of the circle i...

If the perimeter of a rectangular flower bed is 30 feet, and its area is 44 square feet, What is the length of...