To know how many second will pass before jeremy and deborah are.both at the bottom again, we need to calculate the least commom multiple of 20 and 60.
So, the multiples of 20 are: 20, 40, 60, 80, 100, 120, ...
And the multiples of 60 are: 60, 120, 180, 240, 300, ...
Then, the multiples of both 20 and 60 are: 60, 120, 180, 240,...
From those multiples 60 is the minimun one. SO, the least common multiple of 20 and 60 is 60
It means that after 60 seconds Jeremy and Deborah ar
