three tuesdays of a month fall on even days .what day of the week was 21st day of the month?
Hello, tooba!
What did you try?
Three Tuesdays of a month fall on even days.
What day of the week was 21st day of the month?
Since there are three Tuesdays on even days, the calendar must look like this:
. . . $\displaystyle \boxed{\begin{array}{ccccccc}\text{Sun} & \text{Mon} & \text{Tue} & \text{Wed} & \text{Thu} & \text{Fri} & \text{Sat} \\
& * & \boxed{2} & * & * & * & * \\
* & * & 9 & * & * & * & * \\
* & * & \boxed{16} & * & * & * & * \\
* & * & 23 & * & * & * & * \\
* & * & \boxed{30} & & & & \end{array}}$
Got it?