Question

The number(s) which divides the number $21$ without any remainder is/are:

• A. $5$
• B. $7$
• C. $14$
• D. $3$

Answer 1

Answer: (B), (D)

$3$

When a number is divided by its factor, no remainder is obtained.

$21=1\times 3\times 7$
$21=1\times 21$

$\therefore$ Factors of $21$ are $1,3,7$ and $21.$
From the given options, $3$ and $7$ are the correct options.