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    CHAPTER
                     NUMBER SYSTEM                                                                              1

                                                                                Topics Covered                      95%

                                                                                   Data Representation
                                  Hello, Shweta! Welcome to class VII.             What is a Number System?
                                                                                   Conversion of Decimal to Binary
                                                                                   Conversion of Binary to Decimal
                                                                                   Operations on Binary Numbers

                        Thank you, Techie! We missed you during the break. Now we are fresh and
                        eager to begin the new session. What are we going to discuss today?

                                    My dear Shweta, throughout your primary classes, your teachers have made you
                                    count from 1 to 100, 101 to 200 and so on. This system of representing numbers

                                    is  known as  the  decimal  number  system.  However, this  is  not  the  only  system
                                    available to us. There are many more.

                     That does sound interesting, Techie, but we are confused. Please tell me in detail.

                                    Maintain  that curiosity,  kid!  You’ll find out  everything  in this chapter. Let’s get
                                    started!

                                                                                                      Number System    7

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