A bank branch is closed on all Sundays and on the two holidays shaded orange. On how many days is it open in the month shown?

June has 30 days. Its Sundays are the 6th, 13th, 20th and 27th (4). The orange holidays, 17 and 29 June, fall on a Thursday and a Tuesday, not Sundays. Open days = 30 − 4 − 2 = 24. (26 ignores the holidays.)