CTET 2 Math and Science Sep 2014 Paper

Question : 31 of 120

Marks: +1, -0

Numbers

{-11}/20

7/{-15}

17/{-30}

and

{-3}/10

are written in descending order as

Solution:

Given numbers are

\;\;{-11}/{20},\;\;{7}/{-15},\;\;{17}/{-30}

and

\;\;{-3}/{10}

Now,

{-11}/20=-0.55

\;\;{7}/{-15}=-0.466

\;\;{17}/{-30}=-0.566

\;\;{-3}/{10}=-0.3

So, in descending order.

\;\;{-3}/{10} > \;\;{7}/{-15}>\;\;{-11}/{20}>\;\;{17}/{-30}

Alternate method

\;\;{-11}/{20},\;\;{7}/{-15},\;\;{17}/{-30},\;\;{-3}/{10}

{-33}/{60},\;\;{-28}/{60},\;\;{34}/{60},\;\;{-18}/{60}

Now arranging them in descending order,

\;\;{-3}/{10}>\;\;{-7}/{75}>\;\;{-11}/{20}>\;\;{-17}/{30}

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