10. What bird lifts heavy things? (什么鳥能舉起重物？)
11. A ship can contain only fifty persons. Now there is alreadyforty-nine person in it. At this time,a pregnant woman comes on andboards the ship. The shipsinks. Why? (有一艘船只能容納50人，現在已有49人。這時一位孕婦上了船，船就沉了。為什么？)

腦筋急轉彎大全及答案：10. Crane. (鶴。Crane鶴，舉重機)
11. Because is a pigboat. (那是潛水艇。pigboat，潛水艇)