The sum of three consecutive even numbers is 60. what is the smallest of these numbers?

The smallest number is unknown. We can call it "a."

Now the sum would be (a) + (a+2) + (a+4) = 60

3a + 6 = 60

3a = 54

a = 18

So the smallest number is 18. We can verify it:

18 + 20 + 22 = 60

Final 18