Three mischievous grannies were perched on a bench outside their nursing home when an elderly gentleman strolled past. One of the women called out, "We bet we can tell exactly how old you are!"
The man scoffed, "There's no way you could guess it, you old fools."
"Sure we can!" chimed another. "Just drop your pants and undershorts, and we'll tell you your exact age."
A little embarrassed but eager to prove them wrong, he obliged. The grannies then instructed him to turn around a few times and jump up and down several times. After a moment of scrutiny, they announced in unison, "You're 87 years old!"
Standing with his pants around his ankles, the astonished man asked, "How in the world did you guess?"
Slapping their knees and grinning from ear to ear, the three ladies happily yelled, "We were at your birthday party yesterday!"
