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5.  In a binary number system, the leftmost bit contains maximum weight and is called ………………… .
                       a.  MSB                                         b.  LSB
                       c.  Both a and b                                d.  None of these
                     6.  Which of the following is not a positional number system?
                       a.  Roman Number System                         b.  Octal Number System
                       c.  Binary Number System                        d.  Hexadecimal Number System
                     7.  7’s complement of Octal number 523 is ………………… .
                       a.  777                                         b.  365
                       c.  254                                         d.  255
                     8.  Adding hexadecimal digits, A with C will give ………………… .
                       a.  sum=1, carry=6                              b.  sum=6, carry=1
                       c.  sum=5, carry=1                              d.  sum=7, carry=1
                     9.  Adding binary numbers 110 and 1100 gives ………………… .
                       a.  10010                                       b.  10010
                       c.  010010                                      d.  110
                    10.  16’s complement of a hexadecimal number A9D is ………………… .
                       a.  562                                         b.  563
                       c.  673                                         d.  674

                   Answers
                    1.  d      2.  b     3.  c     4.   c   5.   a    6.   a    7.   c    8.   b    9.   c    10.  b

                 B.  Fill in the blanks:
                     1.  The binary equivalent of (0.75)  is ………………… .
                                               10
                     2.  The binary equivalent of hexadecimal digit E is ………………… .
                     3.  2’s complement is obtained by adding ………………… to 1’s complement.
                     4.  The largest two-digit hexadecimal number is ………………… .
                     5.  The result of subtracting the octal number 25 from 56 is ………………… .
                     6.  The binary equivalent of octal 15 is ………………… .

                     7.  Hexadecimal equivalent of octal 23 is ………………… .
                     8.  Adding octal numbers 46 and 22 results in ………………… .
                     9.  Adding hexadecimal numbers, A and B gives ………………… .
                    10.  The octal equivalent of binary 10010 is ………………… .
                    11.  The binary number 11.1 is equal to the decimal number ………………… .
                    12.  Adding binary numbers 1+1+1+1 gives the result as ………………… .

                   Answers
                    1.  0.11       2.   1110        3.  1         4.  FF          5.  31         6.   1101
                    7.   13        8.   70          9.  15        10.  22        11.  3.5       12.  100


                 C.  Answer the following questions:
                     1.  What is a number system? Explain.
                   Ans.  A number system is defined as the representation of numbers by arranging digits or symbols in order of their place values.
                       The value of any digit in a number can be determined by that digit, its position in the number, and the base of the number
                       system.
                       The number system is a way of denoting numbers using digits or symbols. It also follows a definite set of rules to denote its actual
                       value. The value of any number depends on three factors:
                        a.  digits or numerals


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