BTW, here's a little puzzle for you - I claim no originality for it.
You have a large pond, and notice an invasive weed has arrived in it. The weed doubles in area every day, and in 30 days will completely cover the pond. After how many days will the pond be half covered ? 29th day
As it happens, there is a remedy that will kill the weed without destroying the environment, but there's a 10 day lead time before it takes effect. When is the last time you can apply it to prevent the pond being completely choked ? 19th day
And lastly, assuming you get that timing right, how much of the pond is covered by the weed when you apply the treatment ? Pass
You have a large pond, and notice an invasive weed has arrived in it. The weed doubles in area every day, and in 30 days will completely cover the pond. After how many days will the pond be half covered ? 29th day
As it happens, there is a remedy that will kill the weed without destroying the environment, but there's a 10 day lead time before it takes effect. When is the last time you can apply it to prevent the pond being completely choked ? 19th day
And lastly, assuming you get that timing right, how much of the pond is covered by the weed when you apply the treatment ? Pass