Multiple choice What is the result obtained when greatest common factor of 64 and 80 takes away 11? 5 9 7 11 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Factors of 64 are 1, 2, 4, 8, 16, 32, 64. Factors of 80 are 1, 2, 4 5, 8, 10, 16, 20, 40, 80. Greatest common factor of 64 and 80 is 16. Result obtained = 16 - 11 = 5