Sainik School Entrance Exam 2018 Solved Paper

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Question : 28 of 150

Marks: +1, -0

(82)^2-18^2

is equal to :

8212
6418
6400
7204

Solution:

(c)

(82)^2-(18)^2=(82+18)(82-18)

=100 ×64=6400 \cm^3 .

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