How many teeth does a mosquito have?

Insects do not have teeth. Mosquitos use a sort of sharp tube to pierce the skin of their hosts.

Mosquitoes have 47 teeth.

This appears to be a popular "fun fact" that doesn't have any basis in truth.

How many teeth does the average, run of the mill mosquito have. According to 'Issac Asimov' a mosquito has 47 teeth.
http://www.angelfire.com/biz/thefbook/SampleText.html

The proboscis or mouth is a tube-like funnel that extends down and looks like a straw. In the center of the proboscis are two very slender tubes. One tube is for the saliva to flow down into the bite, the other tube is used for sucking blood into the mouth.

The mouth looks like a tube-like funnel, called the proboscis, which extends down. It is used to 'bite', and sip likelihoods, like plant juices. It is really like a straw

The answer is NO.

The likely origin of the "47 teeth" thing:

"A mosquito's proboscis has 47 sharp edges on its tip to help it cut through skin and even protective layers of clothing. Perhaps this is where the rumor of "mosquito teeth" comes from. Unlike human teeth, however, these sharp edges are not used to chew food since blood is already in a liquid form. These sharp edges are simply used to cut through skin. "

http://didyouknowstuff.com/a-mosquito-has-47-teeth