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Digits

by Abdulla » Sat Nov 21, 2009 2:58 pm
For any four digit number, abcd, *abcd*= (3a)(5b)(7c)(11d). What is the value of (n- m) if m and n are four-digit numbers for which *m* = (3r)(5s)(7t)(11u) and *n* = (25)(*m*)?

A) 2000
B) 200
C) 25
D) 20
E) 2

OA is B
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by papgust » Sun Nov 22, 2009 10:16 pm
Take a look at this post. Explanation is great!

https://www.manhattangmat.com/forums/mgm ... t5760.html
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by Abdulla » Sun Nov 22, 2009 10:48 pm
papgust wrote:Take a look at this post. Explanation is great!

https://www.manhattangmat.com/forums/mgm ... t5760.html
Thanks Papgust,

I haven't thought about the function *abcd*. That's why I got 2 ..it's clear now .. thanks again.
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