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# Senior maths challenge watch

1. I don't get why there can't be just 2 points of intersection for this question? Surely there could just be another line on the page that doesn't intersect with any of them? Or are they all continuous lines?

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2. Well... That's one question that I definitely got wrong.
3. (Original post by Inmyimpala)
Well... That's one question that I definitely got wrong.
Same! And I don't understand why!

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4. (Original post by anoymous1111)
I don't get why there can't be just 2 points of intersection for this question? Surely there could just be another line on the page that doesn't intersect with any of them? Or are they all continuous lines?

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You must assume all infinitely extend. Otherwise all options are possible
5. (Original post by Student403)
You must assume all infinitely extend. Otherwise all options are possible
Ok thank you!!

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6. (Original post by Student403)
You must assume all infinitely extend. Otherwise all options are possible
I did assume that and got the correct answer, however I do think they should have clarified.
Unless the mathematical definition of a line is one of infinite length (unless restrictions to domain or range).
7. (Original post by Windowswind123)
I did assume that and got the correct answer, however I do think they should have clarified.
Unless the mathematical definition of a line is one of infinite length (unless restrictions to domain or range).
The mathematical definition is that a line is infinite. A line segment is finite, and a ray is infinite in one direction and finite in the other. It was the piece of paper in the question that threw me.
8. (Original post by Renzhi10122)
The mathematical definition is that a line is infinite. A line segment is finite, and a ray is infinite in one direction and finite in the other. It was the piece of paper in the question that threw me.
Ah right, good to know.

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Updated: November 6, 2015
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