Question

Choose the correct option which describes the number 123 in its general form.

• A. $10\times 1+10\times 2+10\times 3$
• B. $100\times 1+100\times 2+100\times 3$
• C. $100\times 1+10\times 2+1\times 3$
• D. $1\times 1+1\times 2+1\times 3$

Answer 1

The correct option is C

$100\times 1+10\times 2+1\times 3$

Consider a 3-digit number abc.
The general form of this number is
$100\times a+10\times b+1\times c$.

$\therefore 123=100\times 1+10\times 2+1\times 3$