Three elderly grandmas were sitting on a bench outside a nursing home when an old man walked by.
One of the grandmas called out,
Grandma:
“Hey! We bet we can tell you exactly how old you are!”
Old Man:
“There’s no way you can guess my age!”
Grandma:
“Sure we can! Just drop your pants and we’ll tell you your exact age.”
The old man was embarrassed but wanted to prove them wrong, so he agreed.
The grandmas asked him to turn around a few times and then jump up and down several times.
He did exactly as they asked.
The three grandmas looked at each other and said together,
Grandmas:
“You’re 87 years old!”
The old man stared at them in amazement.
Old Man:
“How in the world did you guess my age?”
The three grandmas slapped their knees, gave each other high-fives, and laughed.
Grandmas:
“We were at your birthday party yesterday!”