Question: what is the highest common factor of 24?
Answer: Factors of 24 = 1, 2, 3, 4, 6, 8, 12 and 24. Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18 and 36. Therefore, common factor of 24 and 36 = 1, 2, 3, 4, 6, 8 and 12. Highest common factor (H.C.F) of 24 and 36 = 12.