Question

12. What is the least positive integer by which 392 must be multiplied so that the
perfect cube ?​

Answer 1

Step-by-step explanation:

The least integer by which 392 must be multiplied is 7

Answer 2

Answer:

$392=7*7*2*2*2\\Here, \: the \: numbers \: should \: exist \: in \: pairs \: of \: three.\\But \: there \: are \: only \: two \: 7's. \: So \: we \: multiply \: 392 \: by \: 7 \: i.e,\\392*7=2*2*2*7*7*7\\2744=2*2*2*7*7*7\\\\So \: we \: must \: multiply \: 392 \: by \: 7 \: to \: get \: a \: perfect \: cube \: number.$

                                                                                                         

Answer-

7