Search found 78 matches

by Mehfuj Zahir
Fri Feb 22, 2013 11:15 pm
Forum: Divisional Math Olympiad
Topic: A Easy One
Replies: 5
Views: 1527

Re: A Easy One

প্রশ্নটা এরকম ছিল না ।
সর্বোচ্চ কত গুলো ভিন্ন ভিন্ন সংখ্যার লসাগু 240 হতে পারে ?
Find the maximum number of the different integers that the lcm of them is 240?
সমাধান একই কিন্তু উপস্থাপনটা আলাদা ।
by Mehfuj Zahir
Wed Feb 06, 2013 9:50 pm
Forum: Divisional Math Olympiad
Topic: Rajshahi MO 2013, Secondary 1
Replies: 9
Views: 2142

Re: Rajshahi MO 2013, Secondary 1

Please make sure that you have written the question in correct from.Only one mission word can chage the statement of the question.@Fahim Shahriar. It was the first problem of Rajshahi diviisional math olympiad 2013 (S-1,HS-2) 2013 বাহু বিশিষ্ট বহুভুজের কর্ণগুলো যোগ করলে সর্বোচ্চ কয়টা ছেদবিন্দু পাওয...
by Mehfuj Zahir
Sun Dec 04, 2011 3:28 pm
Forum: Divisional Math Olympiad
Topic: Gopalgang higher hisec 2011 08
Replies: 24
Views: 3833

Re: Gopalgang higher hisec 2011 08

No compose was right . I have copied it from the original question
by Mehfuj Zahir
Thu Oct 20, 2011 8:38 pm
Forum: College / University Level
Topic: Derivatives Lesson?
Replies: 4
Views: 2095

Re: Derivatives Lesson?

Calculus by Md shahalam may be helpful available in any university books library
by Mehfuj Zahir
Mon Jul 11, 2011 7:18 pm
Forum: Divisional Math Olympiad
Topic: Barisal HS 2009_12
Replies: 4
Views: 1175

Re: Barisal HS 2009_12

just use the concept of box. let you 5 boxes and you want to fill the box with different digits now you have 9 ways to fill the 1st box as the id card number is 5 digit number you dont use 0 on it and now you have also 9 ways to fill the 2nd box and 8 ways for 3 rd boxs so the result is 9.9.8.7.6. a...
by Mehfuj Zahir
Mon Jul 11, 2011 7:05 pm
Forum: Divisional Math Olympiad
Topic: Barisal HS 2008_06
Replies: 6
Views: 1385

Re: Barisal HS 2008_06

If the socks are in different size i think its not necessary to count permutation for probability
by Mehfuj Zahir
Sat Jun 18, 2011 10:57 pm
Forum: Higher Secondary Level
Topic: Summation of Series
Replies: 3
Views: 1290

Re: Summation of Series

allen tomar problem ta te vul ace first term ta 12 hobe most probably problem ta kothae theke nico
by Mehfuj Zahir
Sat Jun 18, 2011 5:46 pm
Forum: Higher Secondary Level
Topic: 3rd math test of chittagong math circle
Replies: 7
Views: 1923

Re: 3rd math test of chittagong math circle

sorry @ photon your 3 (b) ans is not correct.please read the question carefully
by Mehfuj Zahir
Fri Jun 03, 2011 10:48 am
Forum: Algebra
Topic: minimum value
Replies: 4
Views: 954

Re: minimum value

using calculus is straight forward and dy/dx=0 for for minimum and maximum value
by Mehfuj Zahir
Fri May 27, 2011 4:57 am
Forum: Geometry
Topic: Need help for vector product
Replies: 4
Views: 1042

Re: Need help for vector product

In 3 d space to calculate the vector product you must know about three axis .Here you dont mentioned about axis and its not possible to give answer according to given condition