Question

Which prime number which comes just after $43$ ?

• A. $49$
• B. $45$
• C. $47$
• D. none of these

Answer 1

Answer: (C)

$47$

Numbers after $43$ are $43,44,45,46,47,\mathrm{48...}$
$44$ is a composite number as it has more than two factors $1,2,11,22,44$
Similarly, $45,46$ has more than two factors.
However $47$ has only two factors $1,47$.
Thus the next prime number after $43$ is $47.$