How to check version of Ruby dev kit installed in my Windows?

Question

Ruby dev kit is installed in my Windows 7. How can I check whether it\'s 32 bit or 64 bit and version number

I\'m not asking How to check ruby version w

Answer 1

On the 32 bit vs 64 bit part:

ruby -e "puts 1.size"

The 32 bit version would yield 4, the 64 bit version 8. (This is the size of a FixNum in bytes.)