Answer: 3 More information: Of course, as time passes, the smallest Erdős number that can still be achieved will necessarily increase, as mathematicians with low Erdős numbers die and become unavailable for collaboration.

Answer: Chameleon More information: The Chameleon's tongue can stretch between 1.5 to two times it's body length. It uses this tongue to catch insects on nearby branches.

Answer: -40 degrees More information: To find the temperature when both are equal, use an algebra trick and just set ºF = ºC and solve one of the equations.