What is the HCM of 35 and 40?

The highest common multiple (HCM) of two numbers is the smallest multiple that is evenly divisible by both. For 35 and 40, you can find the HCM by first determining their least common multiple (LCM). The LCM of 35 and 40 is 280, as it is the smallest number that both can divide into without leaving a remainder. Therefore, the HCM of 35 and 40 is 280.