Search found 244 matches
- Sun Jun 26, 2011 4:26 pm
- Forum: Geometry
- Topic: 2010 chinese girls math olympiad
- Replies: 3
- Views: 2864
Re: 2010 chinese girls math olympiad
Tahmaid vai ... Will u explain the meaning of boxes
- Tue Jun 21, 2011 9:57 pm
- Forum: International Mathematical Olympiad (IMO)
- Topic: IMO - 1972(3)
- Replies: 2
- Views: 2398
IMO - 1972(3)
Prove that (2m)!(2n)! Is divisible by m!n!(m+n)! ....
- Tue Jun 21, 2011 9:29 pm
- Forum: International Mathematical Olympiad (IMO)
- Topic: IMO LONGLISTED PROBLEM 1970
- Replies: 5
- Views: 3659
Re: IMO LONGLISTED PROBLEM 1970
The form of both number is $9^{40n+9}$......
- Tue Jun 21, 2011 7:43 pm
- Forum: International Mathematical Olympiad (IMO)
- Topic: IMO LONGLISTED PROBLEM 1970
- Replies: 5
- Views: 3659
Re: IMO LONGLISTED PROBLEM 1970
Ops sorry ....
- Sat Jun 18, 2011 12:04 pm
- Forum: International Mathematical Olympiad (IMO)
- Topic: IMO LONGLISTED PROBLEM 1970
- Replies: 5
- Views: 3659
Re: IMO LONGLISTED PROBLEM 1970
The last two digits of $(9^{9})^{9}$= A is 09
and for $A^{9}$ that is 89
so only the last digits of A and A to the power 9 is equal
and for $A^{9}$ that is 89
so only the last digits of A and A to the power 9 is equal
- Thu Jun 16, 2011 11:24 pm
- Forum: Geometry
- Topic: I had to use calculator to prove it
- Replies: 1
- Views: 2158
I had to use calculator to prove it
The triangle ABC has following property
* P is a interior point of triangle ABC such that
<PAB = 10 ( That means the angle PAB = 10 degree)
<PBA = 20
<PCA = 30
<PAC = 40
Prove that the triangle ABC is isosceles.
* P is a interior point of triangle ABC such that
<PAB = 10 ( That means the angle PAB = 10 degree)
<PBA = 20
<PCA = 30
<PAC = 40
Prove that the triangle ABC is isosceles.
- Thu Jun 16, 2011 8:38 pm
- Forum: Higher Secondary Level
- Topic: pi
- Replies: 3
- Views: 3242
Re: pi
Showmitro chocroborti'r " praner majhe gonit baje " boi ta porbe ..
- Thu Jun 16, 2011 6:38 pm
- Forum: Higher Secondary Level
- Topic: 3rd math test of chittagong math circle
- Replies: 7
- Views: 5191
Re: 3rd math test of chittagong math circle
5. 1:1
6. f(2m) = m^3-m
f(2m+1)= m(m+1)
After that if we use the following lemma that ,
(s+t)^2 - (s-t)^2 = 4 st then the proof would be completed
6. f(2m) = m^3-m
f(2m+1)= m(m+1)
After that if we use the following lemma that ,
(s+t)^2 - (s-t)^2 = 4 st then the proof would be completed
- Thu Jun 16, 2011 5:38 pm
- Forum: Higher Secondary Level
- Topic: Plz someone help me to solve this problem.
- Replies: 10
- Views: 7900
Re: Plz someone help me to solve this problem.
Thanks to u too . Cause u'r the first one thanked in this forum
- Wed Jun 15, 2011 6:13 pm
- Forum: Higher Secondary Level
- Topic: Plz someone help me to solve this problem.
- Replies: 10
- Views: 7900
Re: Plz someone help me to solve this problem.
The ans will be