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SSC CGL Model Paper 17

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Question : 6 of 99

Marks: +1, -0

Select the terms that will replace the ? in the following series.

C, A, ?, W, U,?

Y,T
Y,S
X,S
X,T

Solution:

Concept:

The series follows a constant backward shift of

2

positions in the English alphabet, wrapping from

A

to

Z

.

Explanation:

Write the alphabet positions:

C=3

,

A=1

,

W=23

,

U=21

.

Apply the pattern:

C \xrightarrow{-2} A \xrightarrow{-2} Y \xrightarrow{-2} W \xrightarrow{-2} U \xrightarrow{-2} S

.

From

A

, subtract

2

:

1-2=-1

, which wraps to

25

, i.e.

Y

.

Then

Y(25)-2=23

, i.e.

W

.

After

U(21)

, subtract

2

:

21-2=19

, i.e.

S

.

So the missing terms are

Y

and

S

.

Answer:

The completed series is

C, A, Y, W, U, S

.

Correct option: B.

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