1001 ^2- 999^2
______________ =
101^2 - 99^2
Answer is 10
What is the fastest way to get to the answer?
______________ =
101^2 - 99^2
Answer is 10
What is the fastest way to get to the answer?
This is a toughie. I think the easiest way to do this is to think of the numerator and the denominator as a difference of two squares. The numerator is:
(1001-999)(1001+999) = 4,000
And the denominator is:
(101-99)(101+99) = 400
4000/400 = 10
Hope this helps!
