Blog

The Quest for 700: Weekly GMAT Challenge (Answer)

Yesterday, Integrated Learning posted a 700 level GMAT question on our blog. Today, they have followed up with the answer: 

Ans. C 

To be a perfect square, you must be able to take the square root of Q.  Practically, that means both x and y need to be even numbers.

 

Statement 1: We learn that Q has at least 4 3’s and 2 7’s in its prime factors, but we don’t know there aren’t more than that.  Q could have 5 3’s, which case y would be 5 and you would not be able to square root Q.

 

Statement 2: Since 243 is 35 and 343 is 73, Q has less than 5 3’s, and less than 3 7’s in its prime factors.  But again, y could be any number less than 5 and x any number less than 3, even or odd.

 

Together – Q has exactly 4 3’s and 2 7’s in its prime factors and is therefore a square of an integer.

 

Integrated Learning provides professional, experienced GMAT tutors throughout the United States.




Upcoming Events


Upcoming Deadlines

  • Oxford Saïd (Round 2)
  • INSEAD (Round 2)
  • NYU Stern (Round 2)
  • Dartmouth Tuck (Round 2)
  • Michigan Ross (Round 2)
  • Virginia Darden (Round 3)

Click here to see the complete deadlines


2020–2021 MBA Essay Analysis

Click here for the 2019–2020 MBA Essay Analysis


MBA Program Updates