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by grandh01 » Tue Sep 11, 2012 8:13 pm
An ice-cream sells two sizes of
cones, Generous and Colossal. How
many Colossal cones were sold one
day?

1) The total sales were $209.15
2) Generous cones sold for 75 cents
and Colossal cones for $1.25

OA IS E
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by neelgandham » Tue Sep 11, 2012 10:19 pm
Let the number of Generous cones sold be G and number of Colossal cones sold be C, then
1) The total sales were $209.15

We don't know the number, nor the price of each type of come. So, statement I is insufficient to answer the question.
2) Generous cones sold for 75 cents and Colossal cones for $1.25
0.75 G = ?
1.25 C = ?
Since, we don't know the total sale amount, we will not be able to tell the number of Colossal cones sold. So, Statement II is insufficient to answer the question.
Form 1 and 2
0.75 G + 1.25 C = 209.15
15 G + 25 C = 4183.
5 *(3G + 5C) = 4183 ??
Now can a multiple of 5 have 3 as its units digit ?

Can you please correct the question if it is wrong or correct me if I am wrong.
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by Brent@GMATPrepNow » Wed Sep 12, 2012 7:11 am
grandh01 wrote:An ice-cream sells two sizes of
cones, Generous and Colossal. How
many Colossal cones were sold one
day?

1) The total sales were $209.15
2) Generous cones sold for 75 cents
and Colossal cones for $1.25

OA IS E
This is a faulty question.

Statement 2 tells us that Generous cones cost 3 quarters each ($0.75), and Colossal cones cost 5 quarters each ($1.25).
So, a purchase of Generous and Colossal cones can be purchased using quarters only.
However, statement 1 tells us the total cost is $209.15. Since we cannot reach a total of $209.15 using quarters alone, this information contradicts statement 2. As such, it cannot be a true GMAT question.

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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