google crawl -- display:none & display:block

When google crawls a web page , do google bot crawl

1. content with code like style="display:none"

2. content with code like style="display:block"

the question i am asking because i have a website of F&Qs.

1. For user i want answers to be displayed only when he clicks on "answer/solution" link.

2. For google bot i want solution section to be crawled else my content of page becomes too less.