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Barrow's large wobbly hat developed an interesting resonance as he got excited. "Real women! On the stage! Egads! The mind boogles."

"Boggles," corrected Sean.

"Mine boogles."

"Boggles," corrected Sean.

"Mine boogles."

A Term a Day:

e is irrational, and is defined by the series: $e=∑↙{n=0}↖{∞}1/{n!}$

e is irrational, and is defined by the series: $e=∑↙{n=0}↖{∞}1/{n!}$

In decimals, its value to 10 significant figures is e = 2.718281828..

The irrational number $e$ is a fundamental natural number of great importance in mathematics. It was searched for by members of the Swiss Bernoulli family in the 17th century, but was finally defined accurately by Leonard Euler. For this reason, it is called Euler's number.