Search found 42 matches
equation solution?
hi,
can someone post the equation solution on this post?
cannot solve the equation.
- by tutonaranjo
Sat Feb 09, 2008 8:43 am- Forum: Problem Solving
- Topic: Gmat Prep - distance/rate problem
- Replies: 16
- Views: 4074
solution
hey... you can't subtract exponents with the same base.
All you could do is factor out like this
2^4 *2^5 / 2^7-2^4 =
2^9/2^4(2^3 - 1) = (factored 2^4 in the denominator)
2^5/(2^3 - 1) = you can only subtract exponents when they are divided
- by tutonaranjo
Tue Feb 05, 2008 7:30 pm- Forum: Problem Solving
- Topic: why is this so hard to me today
- Replies: 2
- Views: 1442
solution
Name angles like this> angle BAO = x angle BOA = x (triangle is isoceles because BO is a radius and it is = CO = AB) angle OBC = y angle BCO = y (triangle is isoceles, two sides are radii) angle BOC = 180 - 2y Solve this. angle CAO+ACO+AOC = 180 ... translated this means x + y + x + 180-2y = 180 sol...
- by tutonaranjo
Tue Feb 05, 2008 2:54 pm- Forum: Data Sufficiency
- Topic: GMATPrep Geometry Bugger
- Replies: 5
- Views: 1958
official answer
you have the answer on your document
it is the one surrounded by the square
I,II only
- by tutonaranjo
Mon Feb 04, 2008 5:43 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question: 2 of 7
- Replies: 4
- Views: 1375
solution
tree was 4 when it was planted grows x every year, so it will grow 6x in total On year 4, tree is 4+4x tall on year 6, tree is 1.2(4+4x) tall. This is becasue 1/5 is 20%. Since it is 1/5 taller it is the same as multiplying by 1.2 on year 6 it is also 4 + 6x tall so you'd have the equation 1.2(4+4x)...
- by tutonaranjo
Mon Feb 04, 2008 5:41 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question:6 of 7
- Replies: 1
- Views: 1311
- by tutonaranjo
Mon Feb 04, 2008 5:25 pm- Forum: Problem Solving
- Topic: GMAT Prep
- Replies: 2
- Views: 1274
- by tutonaranjo
Mon Feb 04, 2008 5:23 pm- Forum: Data Sufficiency
- Topic: GMATPrep Geometry Bugger
- Replies: 5
- Views: 1958
solution
it says positive but not integers
try 1 - this shoudl desqualify III
now try 1/2 and 3/4 by picking numbers - you will find they fit I, II
- by tutonaranjo
Mon Feb 04, 2008 5:21 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question: 2 of 7
- Replies: 4
- Views: 1375
- by tutonaranjo
Mon Feb 04, 2008 5:19 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question: 1 of 7
- Replies: 1
- Views: 1236
solution
this is a permutation problem
But the rule for arranging people in a round table is that it is n-1. This is because order matters and if not you would be counting the one specific permutation twice.
n=5, n-1=4
solution is= 1x2x3x4 = 24
Answer is 24
- by tutonaranjo
Mon Feb 04, 2008 5:17 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question: 3 of 7
- Replies: 3
- Views: 1544
solution
day 1 - $.1 - get baseline fee
day 2 - $.2 - you get charge double the previous day b/c its still less than .3
day 3 - $.3 - you can't get charged double the previous day (.4) because .3 results in a lesser amount
day 4 - $.3 - same as day 3
total = .9
- by tutonaranjo
Mon Feb 04, 2008 5:14 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question: 4 of 7
- Replies: 3
- Views: 1596
solution
Here is how you solve this Angle ABC (of the large triangle) = 180 - 3x. This is because angle BAC is x and angle ACB is 2x. So these two add up 3x and the other angle is 180-3x Angle DBC is 180 - 4x. This is the angle of isoceles triangle DBC. If you subtract the two angles above to find angle ABD,...
- by tutonaranjo
Mon Feb 04, 2008 5:06 pm- Forum: Problem Solving
- Topic: Gmat prep Q3
- Replies: 3
- Views: 1598
0 is neither positive nor negative
question says what is the range of the positive integers
0 is neither positive nor negative (that's the rule)
so its 7-1=6
- by tutonaranjo
Mon Feb 04, 2008 4:46 pm- Forum: Problem Solving
- Topic: GMAT Prep - Tough question: 7 of 7
- Replies: 2
- Views: 1297
Princeton - Probability 2
As part of a game, four people each must secretly choose an integer between 1 and 4, inclusive. What is the approximate likelihood that all four people will choose different numbers?
a) 9%
b) 12%
c) 16%
d) 20%
e) 25%
Answer is A. Someone help with detailed explanation!
thanks in advance
- by tutonaranjo
Thu Sep 20, 2007 11:59 am- Forum: Problem Solving
- Topic: Princeton - Probability 2
- Replies: 0
- Views: 1326
Princeton -Probability
Two couples and one single person are seated at random in a row of five chairs. What is the probability that neither of the couples sits together in adjacent chairs?
a) 1/5
b) 1/4
c) 3/8
d) 2/5
e) 1/2
Answer is D. Someone help with detailed explanation?
- by tutonaranjo
Thu Sep 20, 2007 11:58 am- Forum: Problem Solving
- Topic: Princeton -Probability
- Replies: 1
- Views: 2192