Question

The value of ${55}^2-{54}^2$ is equal to

• A. $109$
• B. $119$
• C. $129$
• D. $111$

Answer 1

The correct option is A

$109$

The given expression is ${55}^2-{54}^2$

$={55}^2-{54}^2$
$=55+54$
[The difference of squares of two consecutive natural numbers is their sum ]

$=109$