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Fun Funny Math Riddles:
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Answer
Four
members of a band
Four members of a band are
walking to a night concert. They decide
to take a shortcut, but must cross a bridge.
Luckily they have one flashlight. Because
of the varying size of their instruments,
it takes each member a different amount
of time to cross the bridge - it takes the
first person one minute, the second person
two minutes, the third person five minutes
and the fourth person ten minutes.
They must cross the bridge in pairs, travelling
at the slower speed so if the one minute
person went with the ten minute person,
it would take a total of ten minutes. Since
there is only one flashlight, one person
must come back across the bridge, then another
pair can cross. They only have 17 minutes
to cross the bridge and still get to the
concert on time. What order should they
cross to get everyone across and get to
the concert?
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ANSWER
First, the one minute person and the two minute person must cross the bridge, for a total of two minutes. Then the one minute person should come back with flashlight - total of three minutes. The five minute person and the ten minute person cross together next, making the total thirteen minutes. Now the two minute person goes back and (total now fifteen minutes) and gets the one minute person and they cross together bringing the total to seventeen minutes. |
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