Search found 20 matches
Not able to follow, can u pls explain in detail Now the highest power of 2 that can exactly divide 50! is 47, hence n=47, Similarly the highest power of 2 that can exactly divide 49! & 48! is 46, the the highest power of 2 that can exactly divide 47! & 46! is 42 Now if we take the factorial...
- by sharmishtha_goel
Thu Aug 11, 2011 6:17 am- Forum: Problem Solving
- Topic: Number Properties
- Replies: 8
- Views: 2121
Something's not right with the question, can you please double check? Hi, Yes, I do feel the same. I think it should be *abcd*= (3^a)(5^b)(7^c)(11^d) and *m* = (3^r)(5^s)(7^t)(11^u). So, if m = rstu n should be r(s+2)tu. So, the difference will be 200. Oh !! My bad!!! It is exactly what you have wr...
- by sharmishtha_goel
Wed Aug 10, 2011 8:30 am- Forum: Problem Solving
- Topic: number theory
- Replies: 4
- Views: 1180
number theory
For any four digit number, abcd, *abcd*= (3a)(5b)(7c)(11d). What is the value of (n – m) if m and n are four-digit numbers for which *m* = (3r)(5s)(7t)(11u) and *n* = (25)(*m*)?
2000
200
25
20
2
TIA
- by sharmishtha_goel
Wed Aug 10, 2011 6:55 am- Forum: Problem Solving
- Topic: number theory
- Replies: 4
- Views: 1180
Aman verma wrote:How ?sharmishtha_goel wrote:IMO E.
for 50! , n = 47
48! , n = 46
47! , n = 42
46! , n = 42
If we take the factorial of a number greater than 51 n > 47
For a number less than 46 , n < 42
- by sharmishtha_goel
Tue Aug 09, 2011 11:42 am- Forum: Problem Solving
- Topic: Number Properties
- Replies: 8
- Views: 2121
how do you check the validation for II and III?? If Median is 130K, i.e. is the 8th value, the seven below are < = 130K . total 2,250K if 1st 8 are 130K then balance is 2,250- 1040 = 1,210K i.e. averaged over remaining 7 is approx 1,728K. hence we can conclude validity of I. Now, if all the remainin...
- by sharmishtha_goel
Tue Aug 09, 2011 11:36 am- Forum: Problem Solving
- Topic: average-median
- Replies: 10
- Views: 1838
- by sharmishtha_goel
Tue Aug 09, 2011 11:13 am- Forum: Problem Solving
- Topic: Number Properties
- Replies: 8
- Views: 2121
- by sharmishtha_goel
Tue Aug 09, 2011 9:18 am- Forum: Data Sufficiency
- Topic: sufficient??
- Replies: 4
- Views: 1109
no explanation thereXLogic wrote:Does it come with an official explanation?sharmishtha_goel wrote:the correct answer is A.
Source : 300+ GMAT CR questions posted on the forum
I'd be interested in their take or the explanation from the experts.
- by sharmishtha_goel
Fri Aug 05, 2011 5:52 am- Forum: Critical Reasoning
- Topic: doubt...
- Replies: 15
- Views: 3082
- by sharmishtha_goel
Thu Aug 04, 2011 1:51 pm- Forum: Critical Reasoning
- Topic: doubt...
- Replies: 15
- Views: 3082
doubt...
28. Since Mayor Drabble always repays her political debts as soon as possible, she will almost certainly appoint Lee to be the new head of the arts commission. Lee has wanted that job for a long time, and Drabble owes Lee a lot for his support in the last election. Which one of the following is an a...
- by sharmishtha_goel
Thu Aug 04, 2011 11:32 am- Forum: Critical Reasoning
- Topic: doubt...
- Replies: 15
- Views: 3082
geometry doubt
Which of the following lists the number of points at which a circle can intersect a triangle? (A) 2 and 6 only (B) 2, 4, and 6 only (C) 1, 2, 3, and 6 only (D) 1, 2, 3, 4, and 6 only (E) 1, 2, 3, 4, 5, and 6 I wanted to clarify whether "intersects" would include tangents (touch ) or not?? ...
- by sharmishtha_goel
Wed Aug 03, 2011 10:13 am- Forum: Problem Solving
- Topic: geometry doubt
- Replies: 2
- Views: 1100
probability
One single person and two couples are to be 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
- by sharmishtha_goel
Tue Aug 02, 2011 12:46 pm- Forum: Problem Solving
- Topic: probability
- Replies: 3
- Views: 1085
Ahmed MS wrote:Answer is B.
= 63^n / 3^16
= (9*7)^n / 3^16
=3^2n*7^n/ 3^16
= (3^2n /3^16) * (7^n / 3^16)
So the value would be n=8, which is <7.
Cheers.
ahhhhhhhh............and how is n i.e 8 < 7??
- by sharmishtha_goel
Tue Aug 02, 2011 12:13 pm- Forum: Data Sufficiency
- Topic: value of n?value of n?
- Replies: 12
- Views: 2049
probability
25. A box contains 3 yellow balls and 5 black balls. One by one, every ball is selected at random without replacement. What is the probability that the fourth ball selected is black? 1/4 1/2 5/8 2/3 3/4 the answer is 5/8. My doubt is that it asks probability of 4th ball being black so why should we ...
- by sharmishtha_goel
Fri Jul 29, 2011 12:09 pm- Forum: Problem Solving
- Topic: probability
- Replies: 1
- Views: 835
Not receiving GMAT daily quant and verbal questions
Hi,
I had subscribed to the above mentioned services but have not received a mail with the daily question since over a month. when i tried to re-subscribe it shows "already subscribed" .
Kindly help.
- by sharmishtha_goel
Fri Jul 29, 2011 7:40 am- Forum: Suggestions and Feedback
- Topic: Not receiving GMAT daily quant and verbal questions
- Replies: 13
- Views: 5096