numbers ∕ four-digit numbers 22xxtable of four-digit numbers (digits) ⫽ 2200 ― 229922x022x122x222x322x422x522x622x722x822x92200220122022203220422052206220722082209221022112212221322142215221622172218221922202221222222232224222522262227222822292230223122322233223422352236223722382239224022412242224322442245224622472248224922502251225222532254225522562257225822592260226122622263226422652266226722682269227022712272227322742275227622772278227922802281228222832284228522862287228822892290229122922293229422952296229722982299