It takes 5 hours to fill a container using machine A. The same container can be filled using machine B in 10 hours. When the container is full, Machine C can fully empty the container in 20 hours. If all three machines start working on the same empty container how long will it take for the container to be completely filled,

Melissa is four times as old as Jim. Pat is 5 years older than Melissa. If Jim is y years old, how old is Pat?

The average (arithmetic mean) of x and y is 20. If x = 5 what is the average of x. y and z?

The sum of two integers is 36, and the difference is 6. What is the smaller of the two numbers?

The angle measure of the base angles of an isosceles triangle are represented by x and the vertex angle is 3x...

Wendy has 5 pairs of pants and 8 shirts. How many different combinations can she make with these items?

Max goes to the gym every fourth day. Ellen's exercise routine is to go every third day. Today is Monday and b...