If xy = 2 and xy2= 8 , what is the value of x?

If a +2b= 6 , ab =4 what is 2/a + 1/b ?

If a and b are integers greater than 100 such that a+b =300 , which of the following could be the exact ratio...

which of the numbers below is not equivalent to 4% ?

If two fair coins are flipped, what is the probability that one will come up heads and the other tails?

At the beginning of a class period, half of the students in a class go to the library. Later in the period, ha...

The number of different signals which can be given form 6 flags of different colours taken one or more at a ti...