Coding and Decoding


1.

If in a certain code, COVET is written as FRYHW, which word would be written as SHDUO?
 

A. STINK
B. TIEVP
C. PEARL
D. REPAY

Option C

Each letter of the word is three steps behind the corresponding letter of the code

2.

If in a certain code, SWITCH is written as TVJSDG, which word would be written as CQFZE?

A. BRAED
B. BRADE
C. BRDAE
D. BREAD

Option D

Each letter at odd place in the word is one step behind and each letter at even place in the word is one step ahead of the corresponding letter of the code. 

3.

If ROBUST is coded as QNATRS in a certain language, which word would be coded as ZXCMP?

A. AYDNQ
B. AWDLQ
C. BZEOR
D. YYBNO

Option A

Each letter of the word is one step ahead of the corresponding letter of the code.

4.

In a certain code, REFRIGERATOR is coded as ROTAREGIRFER. Which word would be coded as NOITINUMMA?

A. AMMUNITION
B. NMMUNITIOA
C. ANMOMIUTNI
D. AMNTOMUIIN

Option A

The order of letters of the word is reversed in the code. So, reverse the letters in the code to get the word.

5.

If FULFNHW is the code for CRICKET, then EULGH is the code for which word?

A. PRIDE
B. BRIDE
C. BLADE
D. BLIND

Option B

Each letter of the word is three steps behind the corresponding letter of the code.

6.

If FULFNHW is the code for CRICKET, then EULGH is the code for which word?

A. PRIDE
B. BRIDE
C. BLADE
D. BLIND

Option B

Each letter of the word is three steps behind the corresponding letter of the code.

7.

If LBAEHC is the code for BLEACH, then which of the following is coded NBOLZKMH?

A. BNLOKZHM
B. MANKYJLG
C. LOBNHMKZ
D. OBNKZLHM

Option A

The word is formed into pairs of letters and the letters in each pair are reversed.

8.

In a certain code, SUBSTITUTION is written as ITSBUSNOITUT. How is DISTRIBUTION written in that code?

A. IRTDISNOIUTB
B. 1RTSIDNOIBUT
C. IRTDISNOITUB
D. IRTSIDNOITUB

Option D

First, the first six letters and then the last six letters are written in a reverse order to obtain the code. 

9.

If in a certain language, GAMBLE is coded as FBLCKF, how is FLOWER coded in that code?

A. HNQYGT
B. GMPVDS
C. GKPVFQ
D. EMNXDS

Option D

The first, third and fifth letters are each moved one step backward, while the second,fourth and sixth letters are each moved one step forward to obtain the corresponding letters of the code.

10.

In a certain code, MONKEY is written as XDJMNL. How is TIGER written in that code?

A. UJHFS
B. SDFHS
C. SHFDQ
D. QDFHS

Option D

The letters of the word are written in a reverse order and then each latter is moved one step backward to obtain the code.

11.

In a certain code, TOGETHER is written as RQEGRJCT. In the same code, PAROLE will be written as

A. RCTQNG
B. NCPQJG
C. NCQPJG
D. RCPQJK

Option B

The letters at odd positions are each moved two steps backward and those at even positions are each moved two steps forward to obtain the corresponding letters of the code. 

12.

If JOSEPH is coded as FKOALD, then GEORGE will be coded as

A. CAKNCA
B. CADMNO
C. CAKNIT
D. DBLODB

Option A

Each letter of the word is moved four steps backward to obtain the code. 

13.

If in a certain language, NATURE is coded as MASUQE, how is FAMINE coded in that code?

A. FBMJND
B. GANIOE
C. EALIME
D. FZMHND

Option C

The second, fourth and sixth letters of the words remain unchanged, while the first,third and fifth letters are each moved one step backward to obtain the corresponding letters of the code.

14.

If DIAMOND is coded as VQYMKLV, how is FEMALE coded?

A. TVNYNV
B. UVNZOV
C. TUMZOU
D. TUMYNU

Option D

If in the word, a letter is nth letter from the beginning of the English alphabet, then in the code the corresponding letter is the (n+ 1)th letter from the end of the alphabet

15.

If BOMBAY is written as MYMYMY, how will TAMIL NADU be written in that code?

A. TIATIATIA
B. IATIATIAT
C. MNUMNUMNU
D. ALDALDALD

Option C

The letters at the third and sixth places are repeated thrice to code BOMBAY as MYMYMY. Similarly, the letters at the third, sixth and ninth places are repeated thrice to code TAMIL NADU as MNUMNUMNU.
 

16.

According to a military code, SYSTEM is SYSMET and NEARER is AENRER. What is the code for FRACTION?
 

A. CARFNOIT
B. CARFTION
C. FRACNOIT
D. ARFCNOIT

Option A

The letters in the first half and the latter half of the word are separately reversed to obtain the code.
 

17.

If in a certain language KINDLE is coded as ELDNIK, how is EXOTIC coded in that code?

A. EOXITC
B. EXOTLC
C. CITOXE
D. COXITE

Option C

The letters of the word are written in a reverse order to obtain the code. 
 

18.

In a coded language COMPUTER is written as RETUPMOC. How is MACHINE written in the same code

A. DHFTCHS
B. HGTIRDM
C. ENIHCAM
D. HGRMSCH

Option C

Letters are reversed.
 

19.

If in a certain language, COUNSEL is coded as BITIRAK, how is GUIDANCE written in that code ?
 

A. EOHYZJBB
B. FOIYZJBB
C. FOHYZJBB
D. None of above

Option C

The letters at odd positions are each moved one step backward, while the letters at even positions are respectively moved six, five, four, three, two … , steps backward to obtain the corresponding letters of the code. 

20.

If COOL is coded as DQRP, then write the code for HOT

A. JQW
B. IQW
C. IQX
D. IPW

Option B

In COOL, first letter is increased by 1, second by 2, third by 3 and so on.

So HOT will be coded as,
H+1 I
O+2 Q
T+3 W

So it will be IQW 
 

21.

In a certain code, TRIPPLE is written as SQHOOKD. How is DISPOSE written in that code ?
 

A. EJTQPTF
B. EJTQPTG
C. CHRPNRD
D. CHRONRD

Option D

Clearly every letter is decreased by 1.
So DISPOSE will be CHRONRD 

22.

If JOSEPH is coded as FKOALD, then GEORGE will be coded as :
 

A. CAKNCA
B. HAKNCA
C. CBKNCA
D. CALNCA

Option A

Each letter of the word is moved four step back to decode it.
So GEORGE will be CAKNCA

23.

In a certain code language the word STANDING is written as NATSGNID. How will the word PRODUCES be written in that language?

A. DOPRSECU
B. DORPSCEU
C. DORPSECU
D. DORPESCU

Option C

The first four letters are first written in reverse order. This is followed by the last four letters also in reverse order.
 

24.

If the batch code of a day is 'five gave it close to mine', which of thew following will be code for fourth batch?
 

A. Five to it close gave mine
B. Mine to close it gave five
C. Five to close it gave mine
D. Close five to gave mine it

Option B

Note that 4th batch is the reverse order of the first batch.
 

25.

The pass code generated for the second batch on a particular day was "fat big nice girl for it was out". What will be the pass code for the sixth batch on that day?
 

A. Out is was girl big fat nice for
B. Out was it girl big nice fat for
C. Out it was girl big nice fat for
D. Out it girl was big nice fat for

Option C

Here the rule followed is: 
In each step the fifth, third and first words become the first, second and third respectively. Fourth word remains at its previous position. Sixth, seventh and eighth words shift one position leftward and the second word becomes the last, i.e., eighth. For the sake of convenience if we assign numeric value to those words, viz. things-1, keep-2, dust-3, your-4, all-5, away-6, from-7 & never-8, the movement will be as follows: 
Batch I(11 a.m. - 12 noon): 1 2 3 4 5 6 7 8 
Batch II(12 noon - 1 p.m.): 5 3 1 4 6 7 8 2 
Batch III(1 p.m. - 2 p.m.): 6 1 5 4 7 8 2 3 
Batch IV(2 p.m. - 3 p.m.): 7 5 6 4 8 2 3 1 
Batch V(3 p.m. - 4 p.m.): 8 6 7 4 2 3 1 5 
Batch VI(4 p.m. - 5 p.m.): 2 7 8 4 3 1 5 6 
Batch VII(5 p.m. - 6 p.m.): 3 8 2 4 1 5 6 7 
Batch VIII(6 p.m. - 7 p.m.): 1 2 3 4 5 6 7 8

26.

Which of the following symbol arrangement will represent '9'?

A. ∆$$$
B. $∆$∆
C. $∆∆$
D. $$∆∆

Option C

9 = 8 + 0 + 0 + 1 
= 1 * 23 + 0 * 22 + 0 * 21 + 1 * 20 = (1001)

27.

In a certain code language the word FUTILE is written as HYVMNI. How will the word PENCIL be written in that language?

A. OIFRLT
B. OIFRLS
C. OLFRIT
D. None of the above

Option D

Odd-placed letters are coded as two places forward and even-placed letters are coded as four places forward as in English alphabet.
 

28.

In a certain code language OUTCOME is written as OQWWEQOE. How is REFRACT written in that code ? 
 

A. RTGITCET
B. RTGTICET
C. RTGITECT
D. RTGICIET

Option A

The first letter is coded as two letters: the first remains unchanged and the second two letters forward as in English alphabet. The second, fourth, fifth and sixth letters are coded as two letters forward while the third letter is coded as three letters forward as in English alphabet. The last letter remains unchanged.
 

29.

In a certain code language GEOPHYSICS is written as IOPDHZRJBT. How is ALTIMETERS written in that code ? 
 

A. NHULBFSDQT
B. NIUKBFSDQT
C. NHUKCFSDQT
D. None of the above

Option D


Divide the word into two halves. Now, reverse the order of the letters of the first half and replace odd positioned letters with one letter forward and even positioned letter with one letter backward as in English alphabet. 
For the second half letter, the odd-positioned letters are coded as one letter forward and even-positioned letters are coded as one letter backward as in English alphabet.
 

30.

If 'P' means 'x', 'R' means '+', 'T' means '÷' and 'S' means '-', then 18T3P9S8R6 = ? 
 

A. 2/3
B. 46
C. 58
D. None of the above

Option D

After decoding , we get 18 ÷ 3 x 9 - 8 + 6 = 6 x 9 - 8 + 6 = 52

31.

In a certain code language GAME is written as 'S ÷ * %' and BEAD is written as '# % ÷ x.' How will the word MADE be written in that code language?

A. $ ÷ x %
B. * ÷ $ %
C. * ÷ x %
D. # ÷ x %

Option C

G($), A(÷), M(*), E(%), B(#), E(%), A(÷), D(x) 
MADE = * ÷ x %
 

32.

Choose the correct alternative that will continue the same pattern and replace 'x' in the series 3,12,27,48,75,x,147

A. 108
B. 127
C. 112
D. 85

Option A

The terms of the given series are 3*(1*1),3*(2*2),3*(3*3),3*(4*4), . . . .
So,missing term is 3*(6*6)=108
 

33.

Find the missing number in the following series.
512, 256, 64, 32, ?
 

A. 16
B. 4
C. 8
D. 10

Option C

512/2 = 256

256/4 = 64

64/2 = 32

32/4 = 8.
 

34.

Look at this series: 31, 29, 24, 22, 17, . . .

What number should come next?
 

A. 15
B. 14
C. 13
D. 12

Option A

This is a simple alternating subtraction series, which subtracts 2, then 5.

Rule = (first number - 2) (second number - 5) (third number - 2) (fourth number - 5)...

Now The series is 31, 29, 24, 22, 17, . . .

(31 - 2 = 29), (29 - 5 = 24), (24 - 2 = 22), (22 - 5 = 17), (17 - 2 = 15)...

So the answer is a = 15.
 

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