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    8.  Three perfectly balanced weighing scales are     9.  A number is  multiplied  by  5  and 4  is
                         given below. If   = 3, then find the values of      subtracted from the product. If 35 is added to
                                                                             the difference and the sum is divided by 3, the
                         and  .                     (Critical Thinking)
                                                                             result is equal to 117. Find the number.
                                                                                                          (Data Analysis)

                                                                                    (a)  38             (b)  58

                                                                                    (c)  55             (d)  64
                                                                         10.  One merchant possesses  `5,00,000  and
                                                                             8 cows.  Another merchant has 12 cows but
     computational thinking quest    (a)  5, 5                               carries a debt of `3,00,000. If both merchants
                                                                             have the exact same net wealth and cows are
                                (b)  5, 6                                    of equal value, what is  the  price  of a single
                                                                             cow?
                                                                                                        (Logical Thinking)
     Tick ( ) the correct option.
                                (c)  6, 5                                           (a)  `1,50,000      (b)  `2,00,000

                                (d)  7, 4                                           (c)  `2,50,000      (d)  `4,00,000

                                       A digital machine uses a specific “Rule Box” to transform an input number (x)
                                       into an output number. You need to decode the machine’s internal logic to find
                                       the missing value. If the input and output of the machine are as follows:

                                                                  Input (x)          Output

                                                                      5                 19
                                                                      8                 28
                                                                     12                 40

                                                                      ?                 31
                                       If the machine just produced an output of 31. What was the original input
                                       number fed into the machine?

                                             (a)  7                                 (b)  9

                                             (c)  10                                (d)  11

                                                                                             Finding the Unknown      53

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