Here are the key numbers for 3/3/09, a.k.a. Square Root Day:
11% - How much the cost of a typical Manhattan apartment increased last year. Prices of Manhattan condos and co-ops all went up. The only problem: there were 25% fewer deals and apartments were two and a half weeks slower to sell.
20 - How many New York City public schools are on the state's list of troubled schools. That's down from 77 when Mayor Bloomberg took control of schools in 2002. More here.
16 - How many toxic waste sites must be cleaned up before the Port Authority can start building the long-planned Trans-Hudson Rail Tunnel that is supposed to make life easier for commuters.