A joke my dad told me when I was young
Timmy went to school every day. On Fridays, his teacher would ask a question and whoever got it right would be excused from school for a week.
One Friday the students were in class at the end of the day and the teacher asks the question. "How many grains of sand are there on the entire earth?"
"But mam, how are we supposed to know that?" The students respond.
"Well I guess I'll see you all Monday!"
The next week on Friday she gets the classes attention…