Digits

[Abdulla]

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

[papgust]

Take a look at this post. Explanation is great!

https://www.manhattangmat.com/forums/mgm ... t5760.html

[Abdulla]

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.