Question

What is the multiplicative identity of integers?

• A. 0
• B. 1
• C. -1
• D. 10

Answer 1

The correct option is B 1

Let's multiply 1 with the integers 3 and 5.
$\underset{–}{3}\times 1=\underset{–}{3}$
&
$\underset{–}{5}\times 1=\underset{–}{5}$

$\therefore$ When we multiply an integer with 1 then the result will always the same as the integer.

So, 1 is the multiplicative identity for integers.