## Dhaka Higher Secondary 2011/2

Problem for Higher Secondary Group from Divisional Mathematical Olympiad will be solved here.
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Please don't post problems (by starting a topic) in the "Higher Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
BdMO
Posts: 134
Joined: Tue Jan 18, 2011 1:31 pm

### Dhaka Higher Secondary 2011/2

\$A\$ is three digit number all of whose digits are different. \$B\$ is a three digit number all of whose digits are same. Find the minimum difference between \$A\$ and \$B\$.

leonardo shawon
Posts: 169
Joined: Sat Jan 01, 2011 4:59 pm
Location: Dhaka

### Re: Dhaka Higher Secondary 2011/2

when the left digit will be same for two numbers...
Ibtehaz Shawon
BRAC University.

long way to go .....

HandaramTheGreat
Posts: 135
Joined: Thu Dec 09, 2010 12:10 pm

### Re: Dhaka Higher Secondary 2011/2

yea... leftmost digit should be same for two numbers, minimum difference of tens digit of two numbers will be \$1\$ and difference of units digit will be \$2\$... so minimum difference is \$12\$...

the arrivals
Posts: 41
Joined: Tue Dec 21, 2010 10:17 pm

### Re: Dhaka Higher Secondary 2011/2

whats problem with 111 and 109.see difference is 02...
women of purity are for men of purity and hence men of purity are for women of purity - THE HOLY QURAN

HandaramTheGreat
Posts: 135
Joined: Thu Dec 09, 2010 12:10 pm

### Re: Dhaka Higher Secondary 2011/2

wah! that's great! i had tried only 2 of dhaka h.s. problems, both are wrong!

the arrivals
Posts: 41
Joined: Tue Dec 21, 2010 10:17 pm

### Re: Dhaka Higher Secondary 2011/2

perhaps you tried its the credit.
women of purity are for men of purity and hence men of purity are for women of purity - THE HOLY QURAN

Moon
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### Re: Dhaka Higher Secondary 2011/2

^^Yup...Dhaka MO was hard!
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin

learn how to write equations, and don't forget to read Forum Guide and Rules.

Tahmid Hasan
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Joined: Thu Dec 09, 2010 5:34 pm

### Re: Dhaka Higher Secondary 2011/2

i could only solve 6 and 2 of them were wrong.
i still haven't solved or couldn't 1 prob
বড় ভালবাসি তোমায়,মা

sm.joty
Posts: 327
Joined: Thu Aug 18, 2011 12:42 am
Location: Dhaka

### Re: Dhaka Higher Secondary 2011/2

I think the answer is 12.
because the highest value of A is 987 and B is 999 .
হার জিত চিরদিন থাকবেই
তবুও এগিয়ে যেতে হবে.........
বাধা-বিঘ্ন না পেরিয়ে
বড় হয়েছে কে কবে.........

*Mahi*
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### Re: Dhaka Higher Secondary 2011/2

@Joty:this is a solved topic and your ans is incorrect. see earlier posts.