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    expressions using

                                     4                                    Letter-Numbers

                                               computational thinking quest

                    Tick ( ) the correct option.

                      1.  X people  hired  a van for excursion.  The      3.  In a company,  the  daily  wages  of workers
                         transport company charged a fixed amount            follow this pattern: A > B > C, and A - C = `600.
                         of `350 and an extra charged `50 for each           If C earns `600, which of the following could
                         person.                                             be the possible maximum daily wage for B?
                          (i)   Find the cost of hiring the van in terms of                          (Analytical Thinking)
                              X.                                                    (a)  `1100          (b)  `1000
                         (ii)   Mr Sandeep booked the van for the group
                              and paid  `1500.  How much amount                     (c)  `1050          (d)  `1200
                              would he receive back, given that X = 18?    4.  The output of the last number machine is
                                                  (Abstract Thinking)                               (Pattern Recognition)
                                                                              3    4  5     6  7     8  9    10 11    12
                               (a)  (i) `350 + 18X    (ii)  `1250

                               (b)  (i) `350 + `50    (ii)  18X

                                                                                10       16       22      28
                               (c)  (i) `350 + `50X   (ii)  `250
                                                                                    (a)  31             (b)  32
                               (d)  (i) `350 + ` 50X   (ii)  `1250

                      2.  The algebraic expression for the difference of            (c)  33             (d)  34
                         (x + y – 3) from (3x – 2 y + 9) subtracted from     5.  For a movie show, an adult ticket costs `x and
                         the sum of (4x + 3y – 9) and (2x – y + z) is        a child ticket costs `y. Geeta bought 4 adult
                                  .             (Algorithmic Thinking)       tickets  and 6 child tickets. She pays  three
                                                                             `500 notes and two `100 notes. The amount
                               (a)  {(4x + 3y – 9) + (2x – y + z)} – (3x – 2y
                                   + 9) – (x + y – 3)                        returned to her is             .
                                                                                                      (Abstract Thinking)
                               (b)  {(4x + 3y – 9) + (2x – y + z)} – {(3x –         (a)  500 – (4x + 6y)
                                   2y + 9) – (x + y – 3)}
                                                                                    (b)  100 – 4x – 6y
                               (c)  {(3x – 2y + 9) – (x + y – 3)} – (4x + 3y
                                   – 9) + (2x – y + z)}                             (c)  1700 – (4x -6y)

                               (d)  None of these                                   (d)  1700 – 4x – 6y

                                                                                   Expressions using Letter-Numbers   23

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