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Q.

The value of ${(99)}^{2} - {(98)}^{2}$ is

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a

143

b

111

c

124

d

197

answer is C.

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Detailed Solution

${(99)}^{2} - {(98)}^{2}$

The difference of squares of two consecutive numbers is their sum.

$= 99 + 98$

$= 197$

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