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I guess my problem is understanding the whole "carry over" statement. Can you please explain to me what that means. I am assuming that it means that when we multiply Y and X in the first column nothing is carried over to the column to the left. But then x cold be 1 or 2 and Y would be the ...
- by Wakka Wakka
Thu Aug 07, 2008 8:30 am- Forum: Problem Solving
- Topic: Page 85, question 174, GMAC Quant Rev, Green book
- Replies: 3
- Views: 3391
- by Wakka Wakka
Wed Aug 06, 2008 4:11 pm- Forum: Problem Solving
- Topic: Pls Explain
- Replies: 6
- Views: 1707
- by Wakka Wakka
Wed Aug 06, 2008 4:03 pm- Forum: Problem Solving
- Topic: Pls Explain
- Replies: 6
- Views: 1707
Ans B: 2.5
split the mixture into quarters, 5 parts black = 1.25 gallons and 3 parts white = .75 gallons.
Since they only come in 1 and 0.5 gallons you need 1 and 0.5 gallons black to get you 1.25 gallons and you need 1 gallon white to get your .75 gallons. Hence you need 2.5 gallons
- by Wakka Wakka
Wed Aug 06, 2008 3:51 pm- Forum: Problem Solving
- Topic: Mixture problem
- Replies: 3
- Views: 2138
Page 85, question 174, GMAC Quant Rev, Green book
I give the referenacein the title because this question comes with symbols. I will try to recreate it here using the square="X", the triangle equal to "Y" and the diamond equal to "v". XY times YX = The product of the two-digit numbers above is the three-digit number Xv...
- by Wakka Wakka
Wed Aug 06, 2008 3:22 pm- Forum: Problem Solving
- Topic: Page 85, question 174, GMAC Quant Rev, Green book
- Replies: 3
- Views: 3391
- by Wakka Wakka
Thu Jul 24, 2008 2:10 pm- Forum: Problem Solving
- Topic: exponents are killing me
- Replies: 5
- Views: 1645
I was just going over the formula and I get that we can take 5^13 to 5^12*5, but how do we get one 5^12 to become 1?
Thanks
- by Wakka Wakka
Thu Jul 24, 2008 1:05 pm- Forum: Problem Solving
- Topic: exponents are killing me
- Replies: 5
- Views: 1645
- by Wakka Wakka
Thu Jul 24, 2008 10:56 am- Forum: Problem Solving
- Topic: exponents are killing me
- Replies: 5
- Views: 1645
I guess it couldn't hurt to post the question also... A, B, C, D, E, F, G, and H are all integers, listed in order of increasing size. When these numbers are arranged on a number line, the distance between any two consecutive numbers is constant. If G and H are equal to 5^12 and 5^13, respectively, ...
- by Wakka Wakka
Thu Jul 24, 2008 10:45 am- Forum: Problem Solving
- Topic: exponents are killing me
- Replies: 5
- Views: 1645
exponents are killing me
From a question in the MH GMAT practice test...from step 1 to step 2 we loose 5^13 which becomes (5-1)...can someone explane this to me please? THanks
1.) 5^12 – 6(5^13 – 5^12) =
2.) 5^12 – 6[5^12(5 – 1)] =
3.) 5^12 – 6(5^12)(4) =
4.) 5^12(1 – 24) =
5.) (-23)5^12.
- by Wakka Wakka
Thu Jul 24, 2008 10:41 am- Forum: Problem Solving
- Topic: exponents are killing me
- Replies: 5
- Views: 1645