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SSC CGL Model Paper 4

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Question : 9 of 100

Marks: +1, -0

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

400,-200,100,7,25,-12.5

-50
50
75
-75

Solution:

Concept:

The series follows division by

-2

each time.

Explanation:

Check consecutive terms:

400 \div (-2) = -200

-200 \div (-2) = 100

So the missing term is

100 \div (-2) = -50

.

Verify next terms:

-50 \div (-2) = 25

25 \div (-2) = -12.5

Answer:

The missing number is

-50

, which is option A.

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