Home Subjects Reasoning Ability Coding-Decoding

Reasoning Ability
Coding-Decoding

Critical thinking and logical reasoning questions

23 Q 8 Topics Take Mock Test
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Difficulty: All Easy Medium Hard 11–20 of 23
Topics in Reasoning Ability
Q.11 Medium Coding-Decoding
Four friends A, B, C, D are standing in a row. B is to the right of A. C is to the right of D but to the left of B. D is to the left of A. What is the correct order?
A D-A-C-B
B A-D-C-B
C D-C-A-B
D C-D-A-B
Correct Answer:  A. D-A-C-B
EXPLANATION

D is leftmost. A is right of D. C is right of D but left of B. B is rightmost. Order: D-A-C-B

Test
Q.12 Medium Coding-Decoding
If COMPUTER is coded as GSVNUCVS, what is the coding method?
A Each letter shifted by 6 positions forward
B Each letter shifted by 6 positions backward
C Reverse and shift by 1
D Random substitution
Correct Answer:  B. Each letter shifted by 6 positions backward
EXPLANATION

C→G (shift -6), O→I (shift -6), etc. Each letter is shifted 6 positions backward in the alphabet.

Test
Q.13 Medium Coding-Decoding
A man walks 8 km North, then 6 km East, then 4 km South. How far is he from the starting point?
A 10 km
B √52 km
C 6√2 km
D 2√13 km
Correct Answer:  D. 2√13 km
EXPLANATION

Net displacement: 6 km East and 4 km North (8-4). Distance = √(6² + 4²) = √(36+16) = √52 = 2√13 km

Test
Q.14 Medium Coding-Decoding
Statement: All teachers are educators. Some educators are researchers. Conclusion: Some teachers are researchers.
A The conclusion follows
B The conclusion does not follow
C Data insufficient
D Partially follows
Correct Answer:  B. The conclusion does not follow
EXPLANATION

From the given statements, we cannot conclude that some teachers are researchers as researchers may only come from non-teacher educators.

Test
Q.15 Medium Coding-Decoding
Six persons A, B, C, D, E, F sit around a circular table. A sits between B and C. D sits opposite to B. E is to the left of A. Who sits opposite to A?
A F
B E
C C
D Cannot be determined
Correct Answer:  A. F
EXPLANATION

In circular arrangement: B-A-C order with A between B and C. D opposite B. E left of A means E-A-C arrangement. F must be opposite A.

Test
Q.16 Medium Coding-Decoding
If DREAM is coded as 4-18-5-1-13, what is code for SLEEP?
A 19-12-5-5-16
B 19-11-4-4-15
C 18-11-5-5-16
D 20-12-5-5-16
Correct Answer:  A. 19-12-5-5-16
EXPLANATION

D=4, R=18, E=5, A=1, M=13 (position in alphabet). S=19, L=12, E=5, E=5, P=16.

Test
Q.17 Medium Coding-Decoding
A train travels North for 10 km, then turns East and travels 15 km, then turns South and travels 10 km. What is the distance from starting point?
A 15 km
B 20 km
C 25 km
D 35 km
Correct Answer:  A. 15 km
EXPLANATION

North 10 km, then East 15 km brings net position 15 km East. Then South 10 km cancels the North movement. Final position: 15 km East of start.

Test
Q.18 Medium Coding-Decoding
Some politicians are honest. All honest people are trustworthy. Which is definitely true?
A Some politicians are trustworthy
B All politicians are trustworthy
C No politicians are trustworthy
D Some trustworthy people are politicians
Correct Answer:  A. Some politicians are trustworthy
EXPLANATION

Some politicians are honest, and all honest people are trustworthy, therefore some politicians must be trustworthy (through the chain).

Test
Q.19 Medium Coding-Decoding
M is uncle of N, N is sister of O, O is father of P. How is P related to M?
A Nephew
B Niece
C Cousin
D Grandchild
Correct Answer:  A. Nephew
EXPLANATION

M is uncle of N. N is sister of O, so M is also uncle of O. O is father of P, so P is nephew of O's uncle M.

Test
Q.20 Medium Coding-Decoding
If code for 'SAFE' is '5@#3' and code for 'RATE' is '2@53', what is the code for 'FATE'?
A #@53
B 6@53
C #@5@
D 3@2#
Correct Answer:  A. #@53
EXPLANATION

S=5, A=@, F=#, E=3. R=2, A=@, T=5, E=3. F=#, A=@, T=5, E=3. Code = #@53.

Test
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