Hi Marty, thanks for your response. Let me clarify. What is the relation of coordinate with this question?
Sure, I too got until this point (p+q)(p-q) = 1155 = 11 x 7 x 3 x 5
Then I started to figure out how to fit in the factors in (p+q) and (p-q) format. Then I got stuck and started looking for the solution.
My basic question is that if this question is asking about the total number of unique factors of 1155. How can that be inferred from this question?[/quote]
Asking how many coordinate points work is an indirect way of asking how many pairs of factors work.
The question didn't need to use coordinate points. It's just a typical
Manhattan Prep practice question with multiple layers. So, we need to first figure out how many possible pairs there are and then determine how many points on the coordinate plane work.
Quote:
Then, if yes, how does it satisfy the values of both p and q?
Well, P and Q themselves are not the factors. They are values that add up and subtract to the factors.
Quote:
Also, in case of unique factors, it would be (1+1) x (1+1) x (1+1) x (1+1) = 16. Why is it 32?
Because points with two negative coordinates work as well.[/quote]
Got it, thanks. So there’s no need to find out wharf value of p+q and p-q is valid with the factors. For example for 1155 = 35 x 33, I could not find anything satisfying values of integers p and q.
Posted from my mobile device