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alextheodosi
- Newbie | Next Rank: 10 Posts
- Posts: 2
- Joined: Sun Mar 03, 2013 5:14 pm
Hi,
Not sure if I am just being dim on this one....taken from Veritas arithmetic problem set
If 375y=x^2 and x andy are positive integers, then which of the following must be an integer?
1) y/15
2) y/30
3)(y^2)/25
a)1 only
b) 3 only
c) 1 and 2
d)1 and 3
e all
There are worked answers which equate x to equal 75. I can follow the worked answers from this point but find it convenient that they land on x=75 and I simply to do not understand why it does so.
Please help!
Al
Not sure if I am just being dim on this one....taken from Veritas arithmetic problem set
If 375y=x^2 and x andy are positive integers, then which of the following must be an integer?
1) y/15
2) y/30
3)(y^2)/25
a)1 only
b) 3 only
c) 1 and 2
d)1 and 3
e all
There are worked answers which equate x to equal 75. I can follow the worked answers from this point but find it convenient that they land on x=75 and I simply to do not understand why it does so.
Please help!
Al
