Coding & Decoding


  1. In a certain code language: ‘678’ means ‘How are you’  ‘347’ means ‘How is life’ ‘569’ means ‘You were wonderful’ Which number is used for ‘You’?


Options: (1) 6  (2) 3  (3) 4   (4) 7   (5) None of these


Soln


      Compare ‘678’ - How are you and ‘347’ - How is life - Common word = How, Common number = 7, 7 = How


      Now in ‘678’, remaining numbers 6, 8 represent are / you


      Compare ‘678’ (How are you) and ‘569’ (You were wonderful)


 Common word = You, Common number = 6, You = 6, Ans: 6


TRICK: Common Word – Common Number Rule. Find the common word in the given meanings > Find the common number in the given codes > Common word = Common number


2. In a certain code language: ‘526’ means ‘Sky is blue’ ‘24’ means ‘Blue colour’ ‘436’ means ‘Colour is fun’ Which number is used for ‘fun’?


Options: (1) 3   (2) 6   (3) 5   (4) 4


Soln


Find common word & common number: 526 → Sky is blue, 24 → Blue colour


Common word Blue → common number 2, So, 2 = Blue


2. Fix the next common pair: 24 → Blue colour, 436 → Colour is fun


Common word Colour → common number 4, So, 4 = Colour


3. Find the common word again: 526 → Sky is blue, 436 → Colour is fun


Common word is → common number 6, So, 6 = is


Remaining number = fun: In 436, numbers are 4, 3, 6, 4 = Colour, 6 = is


Remaining 3 = fun, Ans: 3


3. In a certain code language: ‘123’ means ‘Hot filtered coffee’ ‘356’ means ‘Very hot day’ ‘589’ means ‘Day and night’


   Which number is used for ‘very’?


Options: (1) 5  (2) 6  (3) 8  (4) 9  (5) 2


Soln


Compare ‘123’ (Hot filtered coffee) and ‘356’ (Very hot day) → Common word = Hot, Common number = 3, 3 = Hot


  Compare ‘356’ (Very hot day) and ‘589’ (Day and night)→ Common word = Day, Common number = 5, 5 = Day


  Now look at ‘356’ = Very hot day→ Numbers: 3, 5, 6, 3 = Hot, 5 = Day, Remaining number 6 = Very


Ans: 6


Exam Trick: Find common words → match common numbers → the leftover number gives the answer.