Question

BCNN (20,15)

UWCLN (18,30)

Answer 1

`20=2^{2} .5`

`15=3.5`

 `=>BCN N (20,15)=2^{2}.5.3=60`

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`18=2.3^{2}`

`30=2.3.5`

  `=>ƯCLN (18,30)=3.2=6`

Answer 2

20=22.5

$15=3.5$

 =>BCN N (20,15)=2^{2}.5.3=60=>BCNN(20,15)=22.5.3=60

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18=2.3^{2}18=2.32

$30=\mathrm{2.3.5}$

  $=>ƯCLN(18,30)=3.2=6$