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    B.  Fill in the blanks using the given hints:
                        1.  The decimal number system is a base               system.                            Hints
                                                                                                                 125
                        2.  To convert a decimal number to hexadecimal, repeatedly divide by             .       Base
                        3.  The octal number (175)  is equal to            in the decimal system.               Nibble
                                                  8
                        4.  The subscript of a number shows its            .                                      16
                                                                                                                  10
                        5.  A group of 4 bits is called a          .

                     C.  Write  T  for true and  F  for false.

                        1.  In the binary number system, 1 represents ON and 0 represents OFF.

                        2.  Each digit in binary is called a bit.

                        3.  Each system has a base (radix) that defines how numbers are written.

                        4.  Conversion means changing a number from one base to another.

                        5.  The Most Significant Digit (MSD) in a binary number is the rightmost digit.

                     D.  Answer the following questions:
                        1.  Perform the binary subtraction: (1101)  – (1011) .
                                                                2       2

                        2.   Name the digits used in the hexadecimal system. Give an example.

                        3.  Convert the following decimal numbers into binary:
                            (a)  (51)                                      (b)  (165)
                                   10                                               10

                        4.  What is a number system?

                        5.  State the steps to convert a decimal number into octal.

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                                                                                                      Number System

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