Ten, because six plus four equals ten
6+4=10
10-4=6
The parts that say “the snow fell gently on the trees.” And the sentence “Excitement and anticipation was building as the snow fell” show that it was snowing right then but the other ones suggest that it snowed earlier or might snow later.
With <em>tells </em>being the verb, it is transitive because it transfers its action to the <em>long crazy jokes.</em>