Posts by nicopro (2)

Problem of the day

A group of people steals a stock of books. They decide to share them equally. If everyone gets six books, there are six more. And if everyone gets seven books, they’re missing seven. How many peoples are there ? Write your answer in comments :)

Hello World !

Welcome to the first social network for smart people and online Science Competition ! Post everything you want about Science, Mathematics, Programming ! You can even ask help for your homeworks or just post about your life !

Rating TOP 10

# Name Points
1 profdemath 7
2 mathematik 3
3 alex2311 1
4 unamed 0
5 nicopro 0
6 jul 0
7 nayka2000 0
8 JohnnokoV 0
9 user123 0
10 Allenfiche 0

Register and become the new leader !

Recent problems :
(All problems are in the Training section)

  • Two trains of length 300m and 250m are moving. Each train has a speed of 85 km per hour and moving in the opposite direction. How long will it take for them to pass each other?
  • A plane flies horizontally with a speed V=470 m/s. A man hears the noise of the plane 21 seconds after the passage of the plane above him. From what height flies the plane? Speed of sound: C = 330 m/s.
  • An object falls freely of a height h=490 meters. What distance is it going to fall during the last 2 seconds of fall?