How many integers from 1 to 1000 are divisible by 30 but not by 16 ?

If * is defined for all positive real numbers a and b by a*b=ab/(a+b), then 10*2=?

If the langth of a rectangle is increased by 20% and width is decreased by 20% what is the change in area of r...

The dimensions of a box are 2,3 and 4 meters . the cost of painting the outer sides of the box at the rate of...

In each expression below , N represents a negative integer . Which expression could have a negative value?

If the length of rectangle B and the width of rectangle A is one-half the width of rectangle B, what is the ra...

log36/log6 ___