Question: How many prime numbers are there between 50 and 70?

1. 2
2. 3
3. 4
4. 5
5. 6

Correct Answer: C

Approach Solution (1):

We need to determine the number of prime numbers which are between 50 and 70
Prime numbers greater than 50 and less than 70 are: 53 59, 61, and 67

Hence, number of primes between 50 and 70: 4

Approach Solution (2):

The prime numbers between 50 and 70 are:
53, 59, 61, and 67

So, there are 4 prime numbers.

“How many prime numbers are there between 50 and 70?”- is a topic of the GMAT Quantitative reasoning section of GMAT. This question has been taken from the book “GMAT Official Guide Quantitative Review”. To solve GMAT Problem Solving questions a student must have knowledge about a good amount of qualitative skills.

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