Recent content by Thoughful

I want to now the answer of this question and I think it relates to mathematical induction. The question is: -Suppose is a natural number. In how many ways can we place numbers around a circle such that each number is a divisor of the sum of it's two adjacent numbers? Who can answer this...

I want to know which books are sociable for biology Olympiad ? I want to get Golden Medal! in fact for high school.

How should I understand that in which science I will be a successful person? My abilities are in mathematics but In my country , Relevant jobs are not well-paid . Isn't there any test that i realize my abilities and also choose a good science for learn? Help me -----Help me

Please write some Good sites for learning physics. Thanks

Thank you for your cooperation.

I don't know how should I say for the third question but your guess is correct.English is my second language.

Every one who can answer these 3 questions, help me to understand Physics better.It also help other people who are interested in physics. 1-Imagine you want to drink a glass of water with a straw.Where is better to put the tube for drinking water better? 2-Boats which have engine lurch and the...