ƯCLN`(87; 105; 93)` ƯCLN `(450; 360; 480)`

Ta có :

`87 = 3 . 29`

`105 = 3 . 5 . 7`

`93 = 3 . 31`

`=> ƯCLN(87;105;93) = 3`

Vậy `ƯCLN(87;105;93) = 3`

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Ta có :

`450 = 2 . 3^2 . 5^2`

`360 = 2^3 . 3^2 . 5`

`480 = 2^5 . 3 .5`

`=> ƯCLN(450;360;480) = 2 . 3 . 5 = 30`

Vậy `ƯCLN(450;360;480) = 30`