7. UBS: "If we were playing Russian roulette and had one bullet, I randomly spun the chamber and fired but nothing was fired, would you rather fire the gun again or respin the chamber and then fire on your turn?"
瑞士联合银行：如果我们玩俄罗斯轮盘并且只有一颗子弹，我在转了弹轮之后开枪，没子弹了。轮到你时，你是打开手枪转一圈再对着自己开枪还是直接就拿着我刚开过的枪射自己呢？

8. JANE STREET CAPITAL: "What is the smallest number divisible by 225 that consists of all 1s and 0s?"

简街资本：能被225整除，只包含0和1的最小的数字是多少？