Answer :

Answer:

12

Step-by-step explanation:

Factors of 12 = 1, 2, 3, 4, 6, 12

Factors of 24 = 1, 2, 3, 4, 6, 8, 12, 24.

Common factors of 12 and 24 = 2, 3, 4, 6, 12

Highest Common Factor = 12