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AFCAT Model Paper 7

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Question : 15 of 100

Marks: +1, -0

If in a certain code language, PRINCE is coded as TQRLKH, how MORTAL coded in that code language?

NQUXFR
QNXURF
QOTWES
QZXULW

Solution:

Concept:

In this coding, each pair of letters is shifted by consecutive numbers, and then the pair is reversed.

Explanation:

For

\mathrm{PRINCE}

, the pairs are

\mathrm{PR}

,

\mathrm{IN}

,

\mathrm{CE}

.

\mathrm{PR}\rightarrow\mathrm{TQ}

:

\mathrm{R}+2=\mathrm{T}

and

\mathrm{P}+1=\mathrm{Q}

.

\mathrm{IN}\rightarrow\mathrm{RL}

:

\mathrm{N}+4=\mathrm{R}

and

\mathrm{I}+3=\mathrm{L}

.

\mathrm{CE}\rightarrow\mathrm{KH}

:

\mathrm{E}+6=\mathrm{K}

and

\mathrm{C}+5=\mathrm{H}

.

So the rule is: second letter gets

+2,+4,+6

and comes first; first letter gets

+1,+3,+5

and comes second.

Now apply it to

\mathrm{MORTAL}

.

\mathrm{MO}\rightarrow\mathrm{QN}

:

\mathrm{O}+2=\mathrm{Q}

and

\mathrm{M}+1=\mathrm{N}

.

\mathrm{RT}\rightarrow\mathrm{XU}

:

\mathrm{T}+4=\mathrm{X}

and

\mathrm{R}+3=\mathrm{U}

.

\mathrm{AL}\rightarrow\mathrm{RF}

:

\mathrm{L}+6=\mathrm{R}

and

\mathrm{A}+5=\mathrm{F}

.

Combining these gives

\mathrm{QNXURF}

.

Answer:

Option B:

\mathrm{QNXURF}

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