Question

Which of the following numbers are not divisible by $9$?
$36,90,157,243,514$

• A. $36$
• B. $90$
• C. $157$
• D. $243$

Answer 1

Answer: (C)

$157$

If the sum of all the digits of a number is divisible by $9$ then the number is divisible by $9$.

$36$

$3+6=9=9\times 1,$ which is multiple of $9$

$90$

$9+0=9=9\times 1,$ which is multiple of $9$

$157$

$1+5+7=13,$ which is not a multiple of $9$.

$243$

$2+4+3=9=9\times 1,$which is multiple of $9$

Hence, the correct answer is $Op-\left(C\right)$