Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair
There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?