Make factor tree as large as possible for the number: $56$

Find the $\mathrm{HCF}$ using prime factorisation method: $272, 425$

Find the $\mathrm{HCF}$ using prime factorisation method: $18, 24, 32$

Find the $\mathrm{HCF}$ using prime factorisation method: $91, 175, 49$

Find the $\mathrm{HCF}$ using prime factorisation method: $924, 1463, 1925$

Find the $\mathrm{HCF}$ using prime factorisation method: $150, 140, 210$

Find the $\mathrm{HCF}$ using prime factorisation method: $396, 720, 1080$