请尝试解答下列谜语
1.Pleasewrite55usingonlyfivefours
2.Pleasewrite2usingonlyseventwos
3.Does11and2make1?Pleasehaveaguess
4.Iamsomethingthatneverasksanyquestionsbutasksforalotofanwers.WhatamI
5.Takeawaymyfirstletter:takeawaymysecondletter;takeawayallmyletters;andIremainthesame.WhatamI