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SSC CGL Model Paper 10

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Question : 8 of 100

Marks: +1, -0

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

XIIIII ,IXIIII, IIXIII, IIIXII, IIIIXI ?

IIIIXI
IIIIIXI
IIIIIX
XIIIIX

Solution:

Concept:

The letter

\mathrm{X}

shifts one position to the right in each next term.

Explanation:

Term 1:

\mathrm{XIIIII}

has

\mathrm{X}

at position 1.

Term 2:

\mathrm{IXIIII}

has

\mathrm{X}

at position 2.

Term 3:

\mathrm{IIXIII}

has

\mathrm{X}

at position 3.

Term 4:

\mathrm{IIIXII}

has

\mathrm{X}

at position 4.

Term 5:

\mathrm{IIIIXI}

has

\mathrm{X}

at position 5.

So, in the next term,

\mathrm{X}

must move to position 6.

The term becomes five

\mathrm{I}

's followed by

\mathrm{X}

:

\mathrm{IIIIIX}

.

Answer:

\mathrm{IIIIIX}

(Option C).

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