# Liquid soap

Liquid soap lasted two weeks to one member of the family. How many days will last, if it use:
a) two members
b) 4 members
c) seven members?

Correct result:

a =  7
b =  3.5
c =  2

#### Solution:

$a=14\mathrm{/}2=7$
$b=14\mathrm{/}4=\frac{7}{2}=3.5$
$c=14\mathrm{/}7=2$

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