[ModeratorOMD]

If you say to Siri, "Wolfram Alpha" it says

"What would you like to ask?"

After that, it doesn't matter what you say, Siri will continue to say,

"What would you like to ask?"

It doesn't even work with normal commands after that.

[peterthomas]

Don't have a Siri, so cant try, but wolfram Alpha is the basis on which Siri work, so the reason could simply be that, it would not be allowed to work after than and not programmed to talk about Wolfrom Alpha!

[mtavenger55]

Just tried it. It said "What would you like to ask?" only once. After that I asked it the weather & it worked right away.

[DJBox3r]

Do you have the Wolfram Alpha app installed on your phone?

[iDonev]

On stock iPad with iOS 6 the glitch doesn't exist. Maybe it's a iOS 5 thing or something temporary.