Common factor of 2a2b, 4ab2, 6ac2 :

2ab 4a 2abc 2b

4a

If a number is the factor of two or more numbers, then that number is called a common factor of those numbers. Determine the common factor: 2a2b = 1 × 2 × 2 × a × b 4ab2 = 1 × 2 × 2 × 2 × a × b 6ac2 = 1 × 2 × 2 × 3 × a × c Common factor = 2 × 2 × a = 4a