4. Months of the year are usually labelled numerically by ' 01 ' for January, ' 02 ' for February, and so on, through to ' 12 ' for December. Lydia notices that during January, the number of letters in the name of the month is greater than the month's numerical label (i.e. $7>1$ ).
For how many days during 2024 will the date have that property?
SolUtion
121

The only months that have the property described are January ('01'), February ('02'), March ('03'), and April ('04'). During 2024, these will have $31+29+31+30=121$ days in total.