Question: Greater than 25

Comment on Greater than 25

Sorry, but I don't get the meaning: "2 of the numbers add to 30". Could you say it in different words?
gmat-admin's picture

GIVEN: There are 4 numbers, which we'll call w, x, y and z.
GIVEN: The average of w, x, y and z is 25.

Statement 1) Two of the four values (from w, x, y and z) are such that they add to 30.

So, for example, it could be the case that w = 5 and x = 25 (since the sum of those two values is 30)
Or it could be the case that x = 20 and z = 10 (since the sum of those two values is 30)
Or it could be the case that y = 14 and z = 16 (since the sum of those two values is 30)
etc...

Does that help?

Cheers,
Brent

yes, thank you for immediate reply

Well I just suspect they are not sufficient together but I bet right the solution is E, however I'm not confidence enough to be certain, my brain couldn't list the numbers and it is totally blank in that case, how do i handle this weakness?
gmat-admin's picture

It's important to keep in mind that the adaptive nature of the GMAT pretty much ensures that almost all test makers will be forced to guess at various times during the test. This is when it's important to trust your intuition (as you did with the question).

Really thought that both statements combined were sufficient here. If 2 numbers add to 30 and another one is 40 then the fourth number must be 30 so I thought we could answer the question. (This was my reasoning)
gmat-admin's picture

Keep in mind that there are four numbers in total.
So, even if you're able to glean information about one of the numbers, it's difficult to answer the target question (which is "How many of the numbers are greater than 25?")

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