Question

Given the universal set {$x$ : $xϵN$ and x < 20}, find :

$C=\{x:x\text{is divisible by}4\}$

• A. $\{6,12,18\}$
• B. $\{4,8,12,16,20\}$
• C. $\{5,10,15\}$
• D. $\{4,8,12,16\}$

Answer 1

Answer: (D)

$\{4,8,12,16\}$

Universal set is {$1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19$ }
Out of these elements which are divisible by $4$ are $4,8,12,16$
So, $C=$ { $4,8,12,16$ }