Goolge secrets:find time,PDF file,city weather in search bar

Do you imagine Google search can help do following things?

What time is it?

surely you can check it on right bottom in your pc,but you can see that in Google search bar too:


Go to http://www.google.com/ at the search bar type few words like that :

time in (position you want to check)china 

currency convert

I use usd in gbp as the example :

type amount usd in gbp : 10usd in gbp

The result will be:

Find docements of the specified type

As you finding a file like make money online PDF file in goolge,

you can type : make money online filetype:pdf

See results below:

Finding Specified sites

When you want to find a blogger the title as make money online  ,the site should including :blogsot.com,

you can use the words like that : make money online site:blogspot.com

Find Cite Weather

 weather hong kong that may like: weather hong kong(city you want to check)