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    The technique to represent and work with numbers is called number
                                                system. There are many types of number system. Come, I will tell you.

                                  Okay

                    Test Your Knowledge                                                 21 st  Century   #Critical Thinking
                                                                                            Skills
                                                                                                #Productivity & Accountability
                      Solve the following sums. Also note the time you took to solve each of them.
                      1.  345678 – 789 =                                 (Time taken to solve:         )
                      2.  567 x 55 =                                     (Time taken to solve:         )
                      3.  100 x 9 + 890 – 67 =                           (Time taken to solve:         )
                      4.  22/11 + 20 – 4 x 2 =                           (Time taken to solve:         )
                      Do you know how computer solves these sums and how much time it takes to solve it? Let's find out in this
                      chapter.

                  A computer takes user data and produces information as a result. Despite the frequent interchange of
                  'data' and 'information', it's crucial to distinguish between the two terms. In a strict sense, data refers to
                  the raw, unorganised facts and figures that computers process to produce meaningful information.

                  We learn about numbers and counting from an early age. Toddlers learn at an early age that they can
                  carry two cookies, one in each hand. Kindergarteners start counting by twos and fives. Invariably, we
                  use the decimal number system. Our number system is based on 10, most likely because we have
                  a tendency to count using our ten fingers. Let us learn more about the number system. The digital
                  computer represents all kinds of data and information, like audio, graphics, video, text and numbers,
                  in binary form.

                  NUMBER SYSTEM

                  A number system is a systematic way of representing numbers in terms of quantities. There are a lot
                  of number systems in existence. Consider a digital clock. Digital clocks have 24 hours, each consisting
                  of 60 minutes. Each minute is in turn composed of 60 seconds. When you learnt to count, you used the
                  numbers, like 1, 2, 3, etc. Similarly, computers also have their own number system, known as the binary
                  number system.

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