Answer:
13
Step-by-step explanation:
[tex]65 = 13 \times 5 \\ 156 = 2 \times 2 \times 3 \times 13 [/tex]
HCF = 13
Express the numbers as products of their prime factors
56 = 5 × 13
156 = 2 × 2 × 3 × 13
Identify the prime factors that are common to both numbers, that is 13
