Page 25 - CT&AI_CLasa_7_Part_1

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