Question 833514
Let James' house number be "x", half of the number will be {{{x/2}}}
Now if James multiplies his house number and half his house number together and get 288, we have the equation: 
{{{x*(x/2) = 288}}}
{{{(x^2)/2 = 288}}}
{{{x^2 = 144}}}
{{{sqrt(x^2) = sqrt(144)}}}
{{{x = 12}}}
So his house number is 12
TA-DAH
:D