How many prime numbers between 100 to 150? Choose the correct choice from the following options:  A) 10  B) 11  C) 15  D) 14  E) 13
primes are of the form 6n+1 or 6n-1   Put n=25 ==&gt; 151   for n=26 ==&gt; 157   for n=27 , ==&gt;163   for n=28 , ==&gt; 167   for n =29 ==&gt; 173   for n =30 ==&gt; 179 and 181   for n =31 ==&gt; no prime no.   for n= 32 ==&gt; 191   for n =33 ==&gt; 199   therefore total number of prime numbers = 11   Ans - 11
<result>B</result>
How many prime numbers between 100 to 150?