Worksheet: Coding Decoding | Aptitude Explorer with Worksheets - Class 5 PDF Download

Section A: Multiple Choice Questions (MCQs)

Q1: If MEDICO is written as 'PBGFFL', then DOCTOR is coded as
(a) GLFQRO
(b) GLFQLR
(c) GLFQLS
(d) GRFWLQ 

Q2: If NECK is written as '123%', LUCK is written as '+@3%' and LIKE is written as '+÷%2', then NICE is written as
(a) 1%÷3
(b) 1÷32
(c) 1÷@2
(d) ÷13+ 

Q3: If January is called “March”, March is called “April” and April is called “May”, then which of the following months will have only 30 days?
(a) January
(b) March
(c) April
(d) May 

Q4: If cake is called “egg”, if egg is called “coffee”, coffee is called “tea”, then which is white in colour?
(a) Cake
(b) Egg
(c) Coffee
(d) Tea 

Q5: If the desk is called "chair", chair is called "blackboard", blackboard is called "duster", duster is called "chalk", and then where do you sit in the classroom?
(a) Blackboard
(b) Chair
(c) Desk
(d) Duster 

Q6: Find the code of 'CDEF' if the code for 'LMNO' is 'MOOQ'.
(a) DFFH
(b) HFFD
(c) FHFD                
(d) DHFD

Q7: In a certain code language 'i will go' is written as 'ta ma ra' and 'i will eat' is written as 'ta ma ga', then code for 'eat' is____
(a) ga
(b) ma
(c) ta
(d) ra

Q8: If code for 'MP' = 'LO', then code for 'LL' ='?'
(a) MM                    
(b) BB
(c) KK    
(d) OL

Q9: If 'MKH' is coded as 'IMPS', then how will 'DFJ' be coded?
(a) WUQ    
(b) QUW
(c) UWQ                  
(d) UQW

Q10: If 'Sugar' is called 'Book'; 'Book' is called 'Salt' and 'Salt' is called 'Sweet' then what do we read?
(a) Sugar
(b)  Sweet
(c) Book
(d) Salt

Section B: Fill in the Blanks

Q1: The process of converting a secret message into a specific code is known as _______.

Q2: In coding, each letter or symbol is assigned a unique _______.

Q3: If "Monday" is coded as "Rstpzv", then the code for "Tuesday" will be _______.

Q4: Decoding is the process of _______ the coded message to its original form.

Q5: A code can be a combination of _______ and _______.

Q6: If "FLY" is coded as "KOV", then the code for "BAT" will be _______.

Q7: If "CHART" is coded as "KXEWC", then the code for "BENCH" will be _______.

Q8: If "LONDON" is coded as "XURQWG", then the code for "PARIS" will be _______.

Q9: If "WATER" is coded as "RSDYV", then the code for "OCEAN" will be _______.

Q10: If "SUN" is coded as "YRA", then the code for "MOON" will be _______.

You can access the solutions to this worksheet here.