Question

A number is said to be in the standard form when it is written as $k\times {10}^n$ where $n$ is an integer and:

• A. $1<k<10$
• B. $1<k⩽10$
• C. $1⩽k<10$
• D. $1⩽k⩽10$

Answer 1

The correct option is C $1⩽k<10$

$k\times {10}^n$

If $n$ is an integer, then $k$ should lie between $1$ and $10$.

Lets consider the equalties, $k$ cannot be equal to $10$, if it is then we can update $k=1$ and increment $n$ by $1$.

So, $1\le k<10$