You can ask the same question to a number of your friends at a time.
Just go to your homepage (where your feed is) and type a question into the question box. Select whether you want the question to be anonymous or not, and then select "ask." A window will appear with a list of your friends. Select which friends you want to ask this question to, and then select "ask" again on the second page.
To help curb spamming, you can only ask up to 50 of your friends at a time.