From the archive
Tuesday, 8 September 2026
AVERAGEIFS averages a range, but only over the rows where every condition you give it holds — the same range/criteria pairs SUMIFS and COUNTIFS use, with a mean at the end instead of a total.
You handle sales reporting for a home goods retailer that sells through an online store and physical branches. Eight orders came in yesterday, each logged with its channel, region and amount. In D10, work out the average order value for Online orders placed in the East region. In D11, work out the average order value for In-Store orders under $70.
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.