Ratedrill

About Ratedrill

Ratedrill is time value of money and business math practice problems. It is one of the Dravari drill sites, a family of practice tools built on the same idea: the fastest way to learn a skill you use at a keyboard is to do it, on a live tool, with instant checking, until it is a reflex.

From the founder

I built Ratedrill because the way I actually learned was by doing: a task, a wrong answer, a fix, again. Videos and articles never stuck. Ratedrill is time value of money and business math practice problems, with every answer checked on live data so a memorized formula does not pass. The first tasks are free so you can see whether it works for you before paying anything.

Jair Then Sanchez, founder, Dravari, LLC. Questions go to support@ratedrill.com.

How the exercises work

Read a real scenario: A savings goal, a mortgage, a project or a supplier's terms, with numbers you would see at work. Enter one number: Use a financial calculator, Excel or a pencil. Draw the cash flow timeline if it helps. Learn from the check: Sign error, factor of 12, wrong timing or early rounding. Hints and the worked answer follow.

Every exercise is checked automatically against the expected result, not against a fixed answer string, so a correct approach passes even when it is written differently from the reference solution. If a check ever seems unfair there is a report link under it, and reports are read.

Who makes it

Ratedrill is made and operated by Dravari, LLC, a Delaware limited liability company based in Wilmington, Delaware, USA. The sites are built and maintained by a small team; there is no outside funding and no advertising on the practice pages. Revenue comes from Pro subscriptions, which is what keeps the free exercises free.

Contact

Questions, refunds, bug reports, company training: support@ratedrill.com. We answer within one working day.

The other drill sites

Pricing, Privacy, Terms, Refunds and cancelling.