Coding & Decoding





Q. According to the order of the English alphabet, what will come in place of '?' in the given series ? (āĻ‡āĻ‚ā§°āĻžāĻœā§€ āĻŦā§°ā§āĻŖāĻŽāĻžāĻ˛āĻžā§° āĻ•ā§ā§°āĻŽ āĻ…āĻ¨ā§āĻ¸ā§°āĻŋ āĻĻāĻŋāĻ¯āĻŧāĻž āĻļā§ƒāĻ‚āĻ–āĻ˛āĻžāĻŸā§‹ā§° '?' āĻ¸ā§āĻĨāĻžāĻ¨āĻ¤ āĻ•āĻŋ āĻ†āĻšāĻŋāĻŦ ?)


LYG, JWE, HUC, FSA, ?


A. DQY  B. BOX  C. EPZ  D. CPX



LYG → JWE → HUC → FSA → ?


Observe each letter separately:


L → J → H → F → D (−2) [1st Alphabet of each]
Y → W → U → S → Q (−2) [2nd Alphabet of each]
G → E → C → A → Y (−2) [3rd Alphabet of each]


So next term = DQY


Ans: A. DQY


Q. 91 : 64 :: ? : 36


Option: (A) 48   (B) 98  (C) 61   (D) 82



91 : 64 (Pattern 9 - 1 = 82 = 64)


 Now apply to: 36 (Pattern: 62 = 36)


82 : 36 (Pattern 8 - 2 = 62 =36)


Ans: (D) 82


Q. If 24685 = 42867, then 35791= ?


Option: (A) 37954   (B) 53973  (C) 45627   (D) 69352




Pattern: 2nd, 1st, 4th, 3rd, 5th + 2 


Now apply to: 35791  


Pattern: 5, 3, 9, 7, 1+2 = 3 = 53973


Ans: (B) 53973


Q. 30 : 130 :: ? : 222


Option: (A) 180  (B) 122   (C) 82  (D) 42




Observe the pattern: 30 + 100 = 130


Similarly, 122 + 100 = 222


Ans: (B) 122






Q. If 35796 = 44887, then 46823 = ?


Option: (A) 57914   (B) 55914   (C) 55714   (D) 55934




Pattern: (+1, −1, +1, −1, +1),


Now apply to 46823: ( 6-1=5 / 8+1=9 / 2−1=1 / 3+1=4) = 55914


Ans: (B) 55914


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.