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Total number of balls...

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Master | Next Rank: 500 Posts
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by farooq » Thu Oct 22, 2009 8:28 pm
Q-1. Tom placed a few red and blue balls in a box. He marked all red balls with number 7 and all blues balls with number 3. During his experiment, Tom picked a few balls of both colors and got 441 after multiplying all values. How many balls did Tom picked?

Q-2. How many balls were of Red color?

Q-3. How many balls were of Blue color?

(For actual GMAT question please refer OG-11,PS:Q-234):
Regards,
Farooq Farooqui.
London. UK

It is your Attitude, not your Aptitude, that determines your Altitude.
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Re: Total number of balls...

by mpaudena » Thu Oct 22, 2009 8:36 pm
farooq wrote:Q-1. Tom placed a few red and blue balls in a box. He marked all red balls with number 7 and all blues balls with number 3. During his experiment, Tom picked a few balls of both colors and got 441 after multiplying all values. How many balls did Tom picked?

Q-2. How many balls were of Red color?

Q-3. How many balls were of Blue color?

(For actual GMAT question please refer OG-11,PS:Q-234):
IMO Q1 - 42; Q2 - 21; Q3 - 21; What's the AO?
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Re: Total number of balls...

by farooq » Thu Oct 22, 2009 8:44 pm
mpaudena wrote:
farooq wrote: IMO Q1 - 42; Q2 - 21; Q3 - 21; What's the AO?
Hi,

I tried to made this question for my clear understanding. Here Tom picked few red balls and few blues balls. A number on red and blue balls are 7 and 3 (prime numbers), respectively.

Tom got = 441 = 9*49 = 3*3*7*7. It means tom picked total four balls, two of 3's and two of 7's.

Correct me if I made any mistake while solving this problem.
Regards,
Farooq Farooqui.
London. UK

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by papgust » Thu Oct 22, 2009 9:14 pm
Hi farooq,

Your approach looks perfect and simple to me!
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