Question

$Let{D}_{63}=Numberofpositivedivisorsof63.$
A relation R on A is defined by
a R b $\iff$ a is a divisor of b.

Number of edges in the Hasse diagram of
$[D_{63};R]is$ ______.

• A. 8
• B. 9
• C. 7
• D. 6

Answer 1

The correct option is C 7

option (a)

$D_{63}=\{1,3,7,9,21,63\}$

The Hasse diagram is shown below.


$\therefore$ Number of edges = 7