Question

Find the value of 201 $\times$ 199

• A. 40000
• B. 39999
• C. 29999
• D. 39998

Answer 1

The correct option is B

39999

201 $\times$ 199 = ( 200 + 1) (200-1)

Using the identity $(a+b)(a-b)=(a^2-b^2)$ , we get

= ( $200{)}^2-(1{)}^2$

= 40,000 - 1

= 39,999