Compounds monthly at a constant real return, ignores fees, taxes and employer match. A constant withdrawal rate cannot be sustained indefinitely — sequence-of-returns risk is not modelled.
Decimal to Roman and back, validated strictly: a numeral is only accepted when re-encoding its value reproduces the input exactly, with a count of the symbols used.
Principal, rate, years and a monthly deposit drawn as a real growth curve, with the year-by-year split of interest against principal.
The nominal rate the bank quotes against the rate the money actually earns, and exactly how much a setup fee takes back off it.
Work out the deposit per month that lands on your goal on a given date, then see the projection and whether it is actually reachable.
A real SM-2 deck: grade each card Again, Hard, Good or Easy and get true intervals, real due dates and a 21-day forecast.
Write multiple-choice questions, mark the key, then run the quiz shuffled and score it with a review list of every miss.
Read a passage against a timer and get words per minute, character counts and a reading-speed band, or enter a result you timed yourself.
Turn an octal file mode into the symbolic form, the decimal value and a plain reading of who can read, write or execute.
