 The Monster
Another Riddle You Can Wipe With…
The math teacher, Mr. Grey Matter,
asks in class:
Mr. Grey
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“Four people (Simon, Adrian and two
illegal immigrants) are standing at the
entrance to a dark cave in which a Monster
dwells, and must pass through it. It is
known that the Monster will arrive in
exactly one hour, so that’s the time frame
allocated to crossing the cave.
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“These four have a
single lantern, capable of lighting the way for only
two of them at a time. Their walking pace varies:
Simon can walk the cave in fifteen blinks [minutes], Adrian in a quarter
hour, the third man in over an hour, and the last
man has the flu. Don’t forget, children, that if for instance
the man who can do it in fifteen blinks walks with
the man who needs over an hour, then their time
together would be no less than an hour, because they
must share the lantern, right?
“The Monster can
cross the cave in half an hour, it weighs half a ton
without the shoes and its price (without the
feathers) is like the price of a Popsicle without
the stick. And the question is, my dear children: how old am I?”
The entire classroom is in shock...
Except for two kids and one teacher.
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“I know, Mister Grey!” says Rabbi-Novitch and winks at
Ma-Tilda, “You’re 40 years old.”
“EXACTLY FORTY!!!”
exclaims Grey with astonishment, “How did you calculate
that??”
“Very simple, Sir: my older brother is 20 – and he’s
only half crazy.”
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