& nbsp; presented here detective tasks previously published in the journal "Science and Life", "The Shield," "Tasvir", "World crime" et al., allow to a certain extent to develop the attention, observation, intelligence and resourcefulness ...Features:- Very often, the solution lies in-picture button - "Picture", if any.- Do not rush to press the button - '' The answer is "not yet solved the problem!- Sort tasks by using the "Options"& nbsp; These objectives are loved by all and at all times. Some see them as a kind of "mental gymnastics" means a natural quencher for every thinking person needs to feel and to exercise the power of your mind. Other draws elegant literary sheath: the plot logic problems is often very entertaining. Another advantage of the variety of problems of their accessibility: you can often hear that to solve logic problems requires not special knowledge, but only a certain level of development, the ability to think logically, acquire and develop, just like any other skill, perseverance exercises.