IMO and Talent Search  (English, Paperback, Chandan Sukumar Sengupta)

Questions are there without respective answers. It can be obtained from the source. There exists a plan of fulfilling dual purpose of the effort. These sets can be utilized to engage a student for working out the possible outputs without being inflicted primarily with answers. If answers are provided alongside the questions then the material will fulfill half of the purpose. It cannot contingent for overcoming the problems and also cannot facilitate in skill enhancement efforts. Set of questions can be used for the purpose of assessing skill acquisition process and also can be assigned to the ward by parents and guide.