In a party one of Pastor Tim's friends asked him how many chapattis he could eat with an empty stomach. Pastor Tim replied "Seven".
His friend asked him, "When you eat the first chapatti your stomach is no longer empty. Then how can you eat seven??"
Impressed by this tricky question, as soon as he got home Pastor Tim asked his wife, Susan, "How many chapattis can you eat with an empty stomach??"
Susan answered, "Five"
Pastor Tim answered, "Oh, if only you had answered seven I had a great reply for it."