How many prime numbers are there between 50 and 70?

Question

How many prime numbers are there between 50 and 70?
(A) 2
(B) 3
(C) 4
(D) 5
(E) 6

EgmatQuantExpert · Answer

Solution

To find  
We need to determine
 • The number of prime numbers which are between 50 and 70

Approach and Working out  
Prime numbers greater than 50 and less than 70 are: 53, 59, 61, and 67
 • Hence, number of primes between 50 and 70: 4

Thus, option C is the correct answer.

Correct Answer: Option C

ScottTargetTestPrep · Answer

The prime numbers between 50 and 70 are:

53, 59, 61, and 67

So, there are 4 prime numbers.

Answer: C

Felgro72 · Answer

Is it necessary to know every prime number until 100?

Krunaal · Answer

It isn't; however it's good to know that apart from 2, and 5, every prime no. ends with 1, 3, 7, 9; also, they're of the form 6n - 1 / 6n + 1

Prep Toolkit