Day 72 · Wednesday, 14 October 2026
FV doesn't have to start from zero — handed a starting balance alongside the regular contributions, it grows both at once in a single call instead of needing two projections added together.
You manage facilities for a property management company that keeps a reserve fund for major equipment replacements. The building's HVAC system will need replacing in 6 years. The reserve fund already holds $4,000, invested at 4% annual interest compounded monthly, and the company sets aside a further $150 a month into the same fund. In B6, use FV to project the fund's balance in 6 years. In B8, work out the surplus or shortfall against the $18,000 replacement cost in B7.
A new exercise every morning, plus every day that came before it — a back catalogue that grows by one a day, whether or not you were here for it.
The last 14 days. Today's challenge is free while your streak is alive; Pro opens every past day too.