Question

The number which is the multiplicative identity for integers is

• A. 0.0
• B. 1
• C. 10
• D. 1000

Answer 1

The correct option is B 1

Mulitplicative identity refers to a number which, when multiplied with given a number, results in the given number itself.

For example, if the multiplicative identity is $x$, then the product of $x$ and any number, say $a$, should be equal to $a.$

i.e., $x\times a=a$

$\Rightarrow x=1$

Or, we could say that 1 is the multiplicative identity, because the product of any number and 1 is that number itself.