Search found 35 matches
- Wed Dec 29, 2010 8:07 pm
- Forum: Number Theory
- Topic: What is the 26th digit?
- Replies: 4
- Views: 3252
What is the 26th digit?
N is a 50 digit number( in the decimal scale). All digits except the 26th digit(from the left) are 1. If N is divisible by 13, find the 26th digit.
- Thu Dec 23, 2010 3:15 pm
- Forum: Number Theory
- Topic: An Interesting problem
- Replies: 5
- Views: 4227
Re: An Interesting problem
I'd like to draw everyone's attention to the fact that the topics of many posts are not effective. Without using a proper topic, you actually break the rule number 1 of this forum. http://matholympiad.org.bd/forum/viewtopic.php?f=9&t=6 For example, the title of this post is "An interesting problem"...
- Thu Dec 23, 2010 9:19 am
- Forum: Combinatorics
- Topic: Pirate again !!
- Replies: 7
- Views: 5091
Re: Pirate again !!
Avik bhaia, chorom hoise.. Ami aktur jonno parlam na.........ish.... But Apni boooossssss...
- Tue Dec 21, 2010 9:48 pm
- Forum: Number Theory
- Topic: An Interesting problem
- Replies: 5
- Views: 4227
An Interesting problem
Find all positive integers n such that there are $$k\geq$$ 2 positive rational numbers a1, a2, ............... , ak
satisfying $$a_1+a_2+................+a_k$$=$$a_1a_2...............a_k$$ = n.
satisfying $$a_1+a_2+................+a_k$$=$$a_1a_2...............a_k$$ = n.
- Mon Dec 20, 2010 9:30 pm
- Forum: Junior Level
- Topic: junior combinatorics
- Replies: 4
- Views: 3618
Re: junior combinatorics
The answer is 3*26! . I am not sure..