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# Can you help me with this math problem?

Sun 29 Nov, 2009 11:01 pm
I shouldn't have watched that horror movie last night on TV. It gave me the strangest nightmare. I dreamed I was trapped on a planet of giant insects with Mega-Flies as big as elephants! I thought it was weird that the female Mega-Flies had 8 legs, and the male Mega-FLies only had 3 legs. In my dream I was caught in the web of a Mega-Flies who would not let me go unless I could solve his problem: How many Mega-Flies would he need to catch if he eats 140 Mega-Fly legs each day? He wants to know all the possibilities! What are they??
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Type: Question • Score: 0 • Views: 5,176 • Replies: 5
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Joe Nation

1
Mon 30 Nov, 2009 02:00 pm
How many days does he intend to keep eating? It's a 140per unless I'm reading it incorrectly.
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engineer

1
Mon 30 Nov, 2009 02:28 pm
@Primotivo,
8x + 3y = 140 with x and y equal to integers. Start with one known point. I suggest x=1 and y=44. Every time x goes up by 3, y goes down by 8 to keep the balance. The next point would be (4,36), then (7,28), etc. You can take it from there.
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aidan

1
Mon 30 Nov, 2009 02:28 pm
@Primotivo,
It depends. Does it have to work out evenly - so that there are no mega-fly legs left over or wasted? If that's not a requirement - you could catch how ever many you wanted - as long as you had 44 males say and 1 female - which would give you 140 legs or you could have 36 males and 4 females and that would give you 140 legs, 28 males and seven females, 2o males/10 females, 12 males/13 females, 4 males/16 females ... etc. think about it in terms of multiples of 3 and 8 .
Oh, see I'm a teacher so I gave him the answers hoping that would help him figure out how to do the problem....
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Primotivo

1
Thu 3 Dec, 2009 12:57 am
@Primotivo,
Thanks for the help people!

Gosh! you guys are smart!
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666

1
Tue 13 Sep, 2016 09:07 pm
@Primotivo,
There are six answers, if you want it to be a positive integer. Female: 16, Male: 4. Female: 13, Male: 12. Female: 10, Male: 20. Female: 7, Male: 28. Female: 4, Male: 36. At last Female: 1, Male: 44
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