Math Quiz, Easy! English))). How many GPF are from 30 and 20???? Give way and explanation!

GPF=FPB
FPB=2×5=10

Cara Ini Menggunakan Tabel

................30...............20
(2)............15.................10
2..............15...................5
3...............5...................5
(5).............1.....................1

GPF are from 30 and 20 = 2 × 5 = 10