A blonde decided to redecorate her bedroom. She
wasn't sure how many rolls of wallpaper she would need, but she knew that her
blonde friend from next door had recently done the same job and the two rooms
were identical in size.
"Buffy," she said, "how many rolls of wallpaper did you buy for your bedroom?"
"Ten," said Buffy.
So the blonde bought the ten rolls of paper and did the job, but she had 2 rolls
"Buffy," she said. "I bought ten rolls of wallpaper for the
bedroom, but I've got 2 leftover!"
"Yes," said Buffy. "So did I."