Once upon a time there were two sisters, Laverne and Shirley.
One day Laverne says loudly, "2".
Shirley responds, "So far the sum is 2".
Then Laverne adds 5 to the 2 and says, "7".
Shirley then adds 7 to the sum 2 and thinks "So far the sum is 9".
Then Laverne adds 5 again, this time to the 7 and says, "12".
Shirley then adds 12 to the sum 9 and thinks "So far the sum is 21".
Then Shirley screams "That exceeds 20, EEEEEEE!!!" and runs from the room.
Then when Shirley calms down after screaming, Lavern forgives Shirley for
screaming and the girls then lived happily ever after.
End of story. LOL What an interesting story!
Answer: 12 <---SOLVED
Edwin