Search found 18 matches
C is the logical answer from my perspective too but the answer book states that the correct answer is (b) or 625.
Just making sure I wasnt overlooking something.
Thanks,
- by cgc
Tue Jan 26, 2010 4:58 pm- Forum: Problem Solving
- Topic: Word Problem - Ratio
- Replies: 3
- Views: 2187
Word Problem - Ratio
In a certain pond, 50 fish were caught, tagged, and returned to the pond. A few days later, 50 fish were caught again, of which 2 were found to have been tagged. If the percent of tagged fish in the second catch approximates the percent of tagged fish in the pond, what is the approximate number of f...
- by cgc
Tue Jan 26, 2010 4:29 pm- Forum: Problem Solving
- Topic: Word Problem - Ratio
- Replies: 3
- Views: 2187
- by cgc
Mon Jan 25, 2010 1:24 pm- Forum: Data Sufficiency
- Topic: ds - value question
- Replies: 39
- Views: 19924
ds - value question
If a rope is cut into three pieces of unequal length, what is the length of the shortest of these pieces of rope? (1) The combined length of the longer two pieces of rope is 12 meters. (2) The combined length of the shorter two pieces of rope is 11 meters. for rope x + y + z = a 1. x + y = 12 2. y +...
- by cgc
Mon Jan 25, 2010 11:53 am- Forum: Data Sufficiency
- Topic: ds - value question
- Replies: 39
- Views: 19924
Its the implicit percentage of bonds worth $5000 or more that I missed insnt it?
35% of x = 21
1 variable
1 equation
= sufficient.
OA = C
- by cgc
Mon Jan 25, 2010 11:18 am- Forum: Data Sufficiency
- Topic: Value DS Question - help
- Replies: 2
- Views: 1069
Value DS Question - help
Exactly how many bonds does Bob have?
(1) Of Bob's bonds, exactly 21 are worth at least $5000 each.
(2) Of Bob's bonds exactly 65% are worth less than $5000.
Strategy?
- by cgc
Mon Jan 25, 2010 11:15 am- Forum: Data Sufficiency
- Topic: Value DS Question - help
- Replies: 2
- Views: 1069
- by cgc
Fri Jan 22, 2010 10:21 am- Forum: Problem Solving
- Topic: quadratics - value question
- Replies: 4
- Views: 1291
quadratics - value question
Having trouble solving this questions quickly.... Any suggestions? If one root of the equation 2x(power2)+3x-k=0 is 6, what is the value of k? A. 90 B. 42 C. 18 D. 10 E. -10 I went ahead and solved it this way... 1st - I created the quadratic formula below by dividing the equation by 2 so the x(powe...
- by cgc
Thu Jan 21, 2010 10:22 pm- Forum: Problem Solving
- Topic: quadratics - value question
- Replies: 4
- Views: 1291
So if i understand correctly, i solve the equation by expanding/factoring to get "zero" on one side. Same as solving a quadratic equation. Correct?
This is the way to determine what MUST be true for the remaining variables in an equation.
Thanks,
- by cgc
Wed Jan 20, 2010 10:22 pm- Forum: Problem Solving
- Topic: xy + z = x(y + z), which of the following must be true?
- Replies: 4
- Views: 2835
xy + z = x(y + z), which of the following must be true?
xy + z = x(y + z), which of the following must be true?
a. x=0, z=0
b. x=1, y=1
c. y=1, z=0
d. x=1, y=0
e. x=1, z=0
why is the answer e not a?
please explain. thanks,
- by cgc
Wed Jan 20, 2010 10:59 am- Forum: Problem Solving
- Topic: xy + z = x(y + z), which of the following must be true?
- Replies: 4
- Views: 2835
- by cgc
Wed Jan 13, 2010 7:10 pm- Forum: Problem Solving
- Topic: difficult - remainder remainder questions
- Replies: 3
- Views: 3455
difficult - remainder remainder questions
When integer m is divided by 13, the quotient is q and the remainder is 2. When m is divided by 17, the remainder is also 2. What is the remainder when q is divided by 17?
a. 0
b. 2
c. 4
d. 9
e. 13
Anyone have a good strategy for remainder questions like this one or others in general?
- by cgc
Wed Jan 13, 2010 6:24 pm- Forum: Problem Solving
- Topic: difficult - remainder remainder questions
- Replies: 3
- Views: 3455
roots question - difficult
If n is positive, which of the following is equal to 1/((root n+1) - (root n))?
a. 1
b. root(2n+1)
c. root(n+1)/root n
d. root(n+1) - root n
e. root(n+1) + root n
clueless???
- by cgc
Wed Jan 13, 2010 5:38 pm- Forum: Problem Solving
- Topic: roots question - difficult
- Replies: 3
- Views: 1277
- by cgc
Wed Jan 13, 2010 12:21 pm- Forum: Problem Solving
- Topic: convertions 80km/hr - meters/second
- Replies: 4
- Views: 3164
ok so converting it from km/hr to meters/sec makes sense!! 80km/1hour * 1000meters/60min*60sec = 8000meters/3,600sec However, should the question be 80,000 meters or 800 km instead to get the answer of 400km/18 seconds????? 400meters/18seconds =200(400/18) =80,000meters/3,600seconds Did I miss somet...
- by cgc
Wed Jan 13, 2010 12:20 pm- Forum: Problem Solving
- Topic: convertions 80km/hr - meters/second
- Replies: 4
- Views: 3164