Search found 20 matches
2^(-2x)+2^(-x) = 6
or 4^(-x)+2^(-x) = 6
or 6^(-x) = 6^(1)
or x = -1
therefore, x-(1/x) = -1-(1/-1) = -1+1 = 0
(c)
- by sayanpaul
Wed Jul 03, 2013 11:14 am- Forum: Problem Solving
- Topic: exponents
- Replies: 4
- Views: 1463
RATIO AND PROPORTION
Suppose y varies as the sum of two quantities of which one varies directly as x and the other inversely as x. If y = 6 when x = 4 and y = 10/3 when x = 3, then the relation between x and y is:
A. x = y+4
B. y = 2x+(8/x)
c. y = 2x-(8/x)
D. y = 2x-(4/x)
- by sayanpaul
Wed Jul 03, 2013 3:39 am- Forum: Problem Solving
- Topic: RATIO AND PROPORTION
- Replies: 2
- Views: 5533
- by sayanpaul
Sat Jun 01, 2013 11:44 am- Forum: Problem Solving
- Topic: ratio numerical
- Replies: 3
- Views: 4006
when shall an applicant apply?
Suppose an university asks for a minimum of 3 yrs of work experience to apply for it. Is the 3 yrs. of experience mandatory at the time of joining the programme or at the time of applying to the programme? For example, suppose i want to apply to a school whose application processes are on for 2015 a...
- by sayanpaul
Sat Jun 01, 2013 11:32 am- Forum: The Application Process
- Topic: when shall an applicant apply?
- Replies: 3
- Views: 1302
ratio numerical
The ratio between the ages of a father and a son at present is 5:2 respectively. Four years hence the ratio of the ages of the son and his mother will be 1:2 respectively. What is the ratio of the present ages of the father and the mother?
A. 3:4
B. 5:4
c. 4:3
D. 5:3
E. none of the above
- by sayanpaul
Sat Jun 01, 2013 3:49 am- Forum: Problem Solving
- Topic: ratio numerical
- Replies: 3
- Views: 4006
- by sayanpaul
Sat Jun 01, 2013 3:41 am- Forum: Problem Solving
- Topic: Ratio Problem
- Replies: 3
- Views: 5671
Ratio Problem
An amount of money is to be divided among P,Q and R in the ratio of 3:5:7 respectively. If the amount received by R is Rs.4000 more than the amount received by Q, what will be the total amount received by P and Q together?
A. Rs 8000
B. Rs 12000
C. Rs 16000
D. Rs 20000
E. none of the above
- by sayanpaul
Sat Jun 01, 2013 2:46 am- Forum: Problem Solving
- Topic: Ratio Problem
- Replies: 3
- Views: 5671
buddy...u can try the gmat 60 day study guide available in this site...4 months hai toh abhi se preparation karo...best of luck
- by sayanpaul
Sat May 11, 2013 8:20 am- Forum: Lounge
- Topic: Disappointing First Try...Need Suggestions..!!
- Replies: 3
- Views: 1756
probability
If n is an integer from 1 to 96, what is the probability for n*(n+1)*(n+2) being
divisible by 8?
A 25%
B 50%
C 62.5%
D 72.5%
E 75%
- by sayanpaul
Wed May 08, 2013 10:03 am- Forum: Problem Solving
- Topic: probability
- Replies: 4
- Views: 1352
NUMERICAL CHALLENGE
A certain portfolio consisted of 5 stocks priced at $20, $35, $40, $45, $70, respectively. On a given day the price of one stock increased by 15%, while the price of another decreased by 35% and the prices of the remaining three remained constant. If the average price of a stock in the portfolio ros...
- by sayanpaul
Tue May 07, 2013 8:39 am- Forum: Problem Solving
- Topic: NUMERICAL CHALLENGE
- Replies: 2
- Views: 1230
- by sayanpaul
Tue May 07, 2013 2:00 am- Forum: Problem Solving
- Topic: WORD PROBLEM
- Replies: 4
- Views: 1943
WORD PROBLEM
A certain clock rings two notes at quarter past the hour, four notes at half past and six notes at three-quarters past. On the hour, it rings eight notes plus an additional number of notes equal to whatever hour it is. How many notes will the clock ring between 1:00 pm and 5:00 pm including the ring...
- by sayanpaul
Mon May 06, 2013 10:37 pm- Forum: Problem Solving
- Topic: WORD PROBLEM
- Replies: 4
- Views: 1943
- by sayanpaul
Mon May 06, 2013 10:26 pm- Forum: Problem Solving
- Topic: number system question
- Replies: 4
- Views: 1508
- by sayanpaul
Mon May 06, 2013 9:25 pm- Forum: Problem Solving
- Topic: number system question
- Replies: 4
- Views: 1508
(1) 3x = 2y. We cannot solve for x since there are 2 variables.
(2) 5y-3z =0 and 5x-2z =0
Solving these two equations we get, 10y = 15x or 2y = 3x
Since both the equations in (1) and (2) are equivalent, we cannot solve for x.
Hence E
- by sayanpaul
Tue Apr 09, 2013 9:50 pm- Forum: Data Sufficiency
- Topic: DS "distinct linear equations rule" - exception?
- Replies: 8
- Views: 5149