Answer:
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
In a year, there are 12 months. Seven months have 31 days. How many months have 28 days?
There is one in every corner and two in every room.
Take it and you will lose or gain more than all the others.
Sometimes it's silver but also gold. Printed on paper it's a treasure to hold. What is it?
People take me on walks and I run and have fun. What am I?