Read the exchange from The Number Devil. "You've made a two out of nothing but ones. Now try this—" "That's too hard. I can't do it in my head." "Then use your calculator." "My calculator! You don't think I take it to bed with me, do you?" Which line best reveals that the author's purpose is to entertain? "You've made a two out of nothing but ones. Now try this—" "That's too hard. I can't do it in my head." "Then use your calculator." "My calculator! You don't think I take it to bed with me, do you?"