How many primes less than 1000 are divisible by 7?

none
1
more than 1 but less than 142
142
more than 142

Question

How many primes less than 1000 are divisible by 7?

none 
 1 
 more than 1 but less than 142 
 142 
 more than 142

anonymous · Answer

142


(ten multiples till 70, 20 till 140, 30 till 210  and so on ........... 140 till 980.  after this two more multiples of 7 i.e. 987 and 994)

jamesj · Answer

If a number is prime, it is ONLY divisible by itself and 1.

So the only prime number divisible by 7 is the number 7 itself.

Hence the number of primes less than 1000 divisible by 7 is one: the number 7.