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Re: 2017 Regional no.9 Dhaka

Oops I missed 81and 93!
by Zahin Hasin Rudro
Fri Jun 09, 2017 1:49 am
 
Forum: Divisional Math Olympiad
Topic: 2017 Regional no.9 Dhaka
Replies: 8
Views: 198

Re: 2017 Regional no.9 Dhaka

I got 16 ,how 17 ??
by Zahin Hasin Rudro
Thu Jun 08, 2017 1:00 am
 
Forum: Divisional Math Olympiad
Topic: 2017 Regional no.9 Dhaka
Replies: 8
Views: 198

Re: BdMO '16 regional junior/9

Hint:construct an isosceles triangle by joining the center of any small circle with the two big circles, then form an equation,solve it.......
by Zahin Hasin Rudro
Wed Jan 04, 2017 6:15 pm
 
Forum: Junior Level
Topic: BdMO '16 regional junior/9
Replies: 3
Views: 252

Re: geometry that will make you mad!

thank you very much.
by Zahin Hasin Rudro
Mon Dec 07, 2015 12:39 pm
 
Forum: Junior Level
Topic: geometry that will make you mad!
Replies: 2
Views: 698

Re: Acute angled circular

its C(7,3)=35
by Zahin Hasin Rudro
Thu Sep 03, 2015 5:58 pm
 
Forum: Junior Level
Topic: Acute angled circular
Replies: 13
Views: 1685

2014 chittagong BDMO question 10

can anyone please help me with this question?? ABC is a right angle triangle where angle A is right angle. The perpendicular drawn from A on BC intersects BC at point D. A point P is chosen on the circle drawn through the vertices of ΔADC such that CP perpendicular to BC and AP = AD. If a square is ...
by Zahin Hasin Rudro
Sat Jul 18, 2015 9:43 pm
 
Forum: Junior Level
Topic: 2014 chittagong BDMO question 10
Replies: 2
Views: 666

geometry that will make you mad!

ABC is a right angle triangle where angle A is right angle. The perpendicular drawn from A on BC intersects BC at point D. A point P is chosen on the circle drawn through the vertices of ΔADC such that CP perpendicular to BC and AP = AD. If a square is drawn on the side BP, the area is 340 square un...
by Zahin Hasin Rudro
Fri Jul 17, 2015 3:12 pm
 
Forum: Junior Level
Topic: geometry that will make you mad!
Replies: 2
Views: 698

Re: Acute angled circular

its 7c3 =35.by the formula of combination.
by Zahin Hasin Rudro
Thu Jul 16, 2015 1:22 pm
 
Forum: Junior Level
Topic: Acute angled circular
Replies: 13
Views: 1685

triangle inscribed in a square

AVIK is a square. The point E is taken on VK in such a way that 3VE=EK. F is the midpoint of AK.
What is the value of FEI?


source:2014 national junior
by Zahin Hasin Rudro
Thu Jul 16, 2015 1:15 pm
 
Forum: Junior Level
Topic: triangle inscribed in a square
Replies: 2
Views: 502

so big series

A new series is to be created after erasing some numbers from the series 1, 2, 3,
4…………. 400, in such a way so that the sum of any two numbers from the series
are not divisible by 7. What is the maximum number of terms to be found in new
series?

source:2014 dhaka ancholik, junior
by Zahin Hasin Rudro
Wed Jul 15, 2015 2:26 pm
 
Forum: Junior Level
Topic: so big series
Replies: 1
Views: 428

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