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Numbers Basics 1/3



13.  By which of the following numbers 600 has to be multiplied so that it becomes a perfect square?
a.    2
b.    3
c.    5
d.    6


14.  By which of the following numbers 600 has to be multiplied so that it becomes a perfect cube?
a.    9
b.    15
c.    45
d.    90


15.  By what least number $3240$ has to be divided so that it becomes a perfect square?
a.    2
b.    5
c.    10
d.    15


16.  By what least number $3240$ has to be divisible so that it becomes a perfect cube?
a.    2
b.    5
c.    10
d.    15


17.  $1.\overline {234} = $
a.    $\dfrac{{137}}{{111}}$
b.    $\dfrac{{684}}{{555}}$
c.    $\dfrac{{138}}{{111}}$
d.    $\dfrac{{139}}{{111}}$


18.   $15.\overline {12} = $
a.    $\dfrac{{500}}{{33}}$
b.    $\dfrac{{499}}{{33}}$
c.    $\dfrac{{1000}}{{67}}$
d.    $\dfrac{{501}}{{33}}$