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Dhaka Junior 2011/1

Posted: Wed Feb 02, 2011 8:21 am
by Moon
1. What is the minimum difference between a $12$ digit odd number and a $11$ digit even number?

Re: Dhaka Junior 2011/1

Posted: Wed Feb 02, 2011 11:27 am
by Mehfuj Zahir
Differnce should be 3

Re: Dhaka Junior 2011/1

Posted: Wed Feb 02, 2011 2:44 pm
by Moon
Ok...What did we learn from the sentence "Differnce should be 3"? In divisional you can write this and probably get full point, but here our main goal is to discuss and learn. So PLEASE everyone post complete solution or at least some outline/logic, please.

Re: Dhaka Junior 2011/1

Posted: Wed Feb 02, 2011 3:08 pm
by Mehfuj Zahir
The minimum difference between a 12 digit odd 11& digit even number should be the difference between last 11digit even number and 1st 12 digit odd number.Thus we get 3

Re: Dhaka Junior 2011/1

Posted: Thu Dec 01, 2011 9:52 pm
by ataher.sams
I think that's r8.... ;)