A book can provide timely relevant support to students. It can even equip a student differently for making oneself fit for accepting challenges of some broad spectrum. This collection is exclusively meant for students aspiring for examinations of Standard 10th . It can also provide adequate references to students aspiring for various competitive examinations. The collection of this series is coming in accord to the subject areas.

Basic Science is the field of study which is common for most of the competitive examinations. The general understanding on the theories and their applications is the general expectation of examiners from a student of school education. One should understand the application of scientific temperaments for solving day to day problems. Ecology and environment is the common core of content areas for all possible levels of discussions related to science and scientific observations.

For Students

We expect a kind of understanding from students of Grade 10 to 12 of the National Curriculum. The fellow student should understand the number system and related operations. There are some relationships exist in between number systems of various types. We often come across four different number system in computer Science. For the class works and mathematical operations of Grade 4 we restrict our discussion to decimal system only.

I hope the kind of effort and combination of problems might enhance the knowledge base of our fellow students.