If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

# GMAT: Data sufficiency 28

116-118, pg. 288. Created by Sal Khan.

## Want to join the conversation?

• Q117 @5.45 MN+KN=15 not 30 as we divide both sides by 2 right?

Best Regards

Kosta
• Yes, that's correct, although it's not necessary to answer the question.
• Does anyone have the answer key? Question 117 is highly ambiguous and Sal may have listed the incorrect answer through no fault of his own. The question asks for the ratio of KN to MN. In the truest sense, the ratio is 2 to 3, and Sal's answer would be correct. But if they are asking for the specific numerical value of the ratio, then you actually would need statement 1 too. Statement one allows you to manipulate an equation so that L+W = 15. Therefore the true ratio would be 6 to 9
• 2 3 5 are the prime numbers. 1 4 and 6 are not prime. 6 is divisable by 2 and 3, 4 is divisible by 2. 1 is not a prime number. A prime number is a positive integer greater than 1, which is only divisible by itself & 1. Also 2 is the first and only even prime number that there is. So 1 4, and 5 are irrelevant. The question is a number n<7 and a prime number less than 7 an integer. Yes it is. The question does not ask which number because there are 3 possible solutions here. 2,3,5
• Sal I don'nt think 6 is a prime number.