Question

which has teeth but cannot eat

Answer 1

What has teeth but can t bite?

Has Teeth But Can't Bite. A comb. Other inanimate objects with teeth like a saw, zipper or a gear can “bite” you.



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Answer 2

Gear has teeth but cannot eat.

EXPLANATION:

A gear is one of the kinds of the machine element in which the teeth are cut around a cylindrical shape or conical shape of surfaces with some equal spacing. Gears and its mechanical characterization are widely used in a variety of devices in a mechanical field.The gear teeth are designed in order to minimize wear, noise and vibration and to maximize the power transmission efficiency.  

Hence Gear has teeth but cannot eat. So the answer of riddle is Gear. Riddle is constructed to show the uses of Gear