Because this condition: 1 and the 2nd of this month are Sunday and Monday respectively, it can be confirmed that the 29th is Sunday and the 30th is Monday (calculated according to the implicit condition of 7 days a week).

More Mondays than Tuesdays means that this month must be >; =29 days and

Sunday is greater than Saturday, which means that the month must be greater than or equal to 30 days and less than 3 1

In a word, there are 30 days in this month.

Backward push method:

The answer is nothing more than one of four days: 28 days, 29 days, 30 days, 365,438+0 days. It can be seen that the above conditions are only met within 30 days. I hope it helps you. . .