From the archive
Monday, 31 August 2026
LET names a value once so a formula reads as a sentence instead of three separate references to the same cell.
You run payroll for a five-person team at a small design studio. Every paycheck deducts a flat 20% of gross pay for income tax and a further 5% of the same gross pay for the pension scheme. In column C, work out each employee's net pay — using LET to name the gross pay once rather than writing the same cell reference three times over.
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.