Search found 70 matches
Answer: C (both together are sufficient). as per given condition: a + ad + ad^2 = 21 (=S3) a*(1 + d + d^2) = 21 Hence To calculate the sum of 6 terms, we need to know both a & d. lets check the given conditions: I: a = 3: it means: (1+ d+ d^2) = 7 solve to get: (d+3)(d-2) = 0 -> d = -3, 2 NOT SU...
- by Bharat
Fri Dec 17, 2010 5:38 pm- Forum: Data Sufficiency
- Topic: Different values thru the geometric progression?
- Replies: 2
- Views: 1113
Answer: D (both are sufficient individually). A product is even if remainder on division by 2 is 0. Note that according to this definition, 0 is also even (remainder is zero). I: x = y+1 you are correct that it means if y is even then x is odd (& vice versa). Hence one of the components is alway...
- by Bharat
Fri Dec 17, 2010 5:20 pm- Forum: Data Sufficiency
- Topic: Even/Odd Data Sufficiency Question
- Replies: 2
- Views: 1454
Answer: A
the dash type is irrelevant here (because Peter runs at the same rate). solve using simple speed relations:
X meters = 5 seconds
1 meter = 5/X seconds
Z meters = 5Z/X seconds.
Let me know if you have questions.
Regards,
Bharat.
- by Bharat
Fri Dec 17, 2010 5:02 pm- Forum: Problem Solving
- Topic: distance rate time
- Replies: 1
- Views: 1119
Answer: A Please follow parallelism for the answer. There are three mysteries: unexpected power, upward thrust & electromagnetic waves. Extra words in the sentence are to qualify (describe) these three further. B: EM waves appear as information rather than a mystery. C, D: Thrust & EM waves ...
- by Bharat
Sat Dec 11, 2010 4:17 pm- Forum: Sentence Correction
- Topic: Seismologists studying the earthquake
- Replies: 2
- Views: 4049
Answer: D H1 = 4 ft let d be the change in height every year. H4 = 4 + 4d H6 = 4 + 6d Given: H6 - H4 = (1/5)*H4 replace values in this equation from above & solve for d. (4 + 6d) - (4 + 4d) = (1/5)*(4 + 4d) 2d = (1/5)*(4 + 4d) 10d = 4 + 4d 6d = 4 or d = 2/3 let me know if you have questions. Reg...
- by Bharat
Sat Dec 11, 2010 4:09 pm- Forum: Problem Solving
- Topic: A tree's growth rate?
- Replies: 2
- Views: 1356
Answer: 4 In the original sentence, "when he calls her" is in present tense (present indefinite tense) & also appears to be the first event. [He calls > she responds > still he pretends] Hence all the following phrases must be in present or future tense. It means that choice# 1, 2, 3 &...
- by Bharat
Fri Dec 10, 2010 9:15 pm- Forum: Sentence Correction
- Topic: phone
- Replies: 9
- Views: 1908
Hi Woozler,
As per given information: cost = k*t*(l^2). (here is k is a proportional constant).
from #2: 160 = k*0.2*(2^2) - k*0.1*(2^2)
from here we can solve for k.
Put k back in cost formula & plug in t = 0.1, l = 3 to get the cost.
Let me know if you have further questions.
Regards,
Bharat.
- by Bharat
Wed Dec 08, 2010 3:45 pm- Forum: Data Sufficiency
- Topic: Concrete slabs
- Replies: 4
- Views: 1409
Hi Woozler,
It appears that there is some typographical error in statement 1: "....quare slab 2 meters long and 0.2 m long...." (both are lengths?)
Otherwise the difference in price of two slabs is sufficient to answer the question. So statement 2 alone is sufficient here.
Regards,
Bharat
- by Bharat
Wed Dec 08, 2010 3:16 pm- Forum: Data Sufficiency
- Topic: Concrete slabs
- Replies: 4
- Views: 1409
Hi Gustavo, Here is an explanation, let me know if it is not clear: Average speed = distance/time from time condition: t2 - t1 = 2 & t2 + t1 = 18; solve for t1: t1 = 8 from distance condition: s1 + s2 = 64; i.e., s2 = 64 - s1 from av. speed condition: v2 - v1 = 1, i.e., (s2/t2) - (s1/t1) = 1 rep...
- by Bharat
Wed Dec 08, 2010 3:10 pm- Forum: GMAT Math
- Topic: Difficult Rates question
- Replies: 8
- Views: 2915
Ans: D For circular arrangements, the simple way is to fix the position/seat of anyone object/person & then try to calculate the possible arrangements for remaining objects/persons. Begin with assuming that there are 14 chair around the table & obviously males/females will sit on alternate c...
- by Bharat
Tue Dec 07, 2010 6:11 pm- Forum: Problem Solving
- Topic: circular permutations
- Replies: 2
- Views: 1406
Hi goyalsau, thanks for the response & noticing the error. You are correct, my count has a typographical error. Below is correction with detail. Total surface area of cube = 600 (=6*10*10) sq. units 8 vertex cubes are painted on 3 surfaces, hence each of these is counted thrice (total 3*8) in th...
- by Bharat
Sat Dec 04, 2010 9:28 pm- Forum: Data Sufficiency
- Topic: Cube Problem
- Replies: 5
- Views: 2451
Hi mba_aspirant911, the faster approach is solving a few terms of the series: S1: 1 S2: 12 S3: 123 A1: 9 A2: 98 A3: 987 Q(1,1): 10 = S1+A1 Q(2,2): 110 = S2+A2 Q(3,3): 1110 = S3+A3 Q(1,2): 99 = (S1 + A2) Q(2,1): 21 = (S2 + A1) Looking at the value of Q; Sum of Q's digit will be maximum when both n &a...
- by Bharat
Sat Dec 04, 2010 11:34 am- Forum: Problem Solving
- Topic: Tough Sequences Question
- Replies: 5
- Views: 1355
Hi Abhishek,
In A: "...in the United States be prohibited..." the word prohibited appears to qualify US rather than the intended word "sale". However, in C this error is corrected "..prohibiting the sale.."
Let me know if you have questions.
Regards,
Bharat.
- by Bharat
Sat Dec 04, 2010 11:16 am- Forum: Sentence Correction
- Topic: directive -SC
- Replies: 2
- Views: 1104
Hi Paritosh, we need to assess if we can identify % change in profit from 6th to 7th year. Statement 1: informs the % change between 3rd & 7th year: NOT SUFFICIENT. Statement 2: informs the % of change is same for each consecutive year: NOT SUFFICIENT. However, if you put these two together: we ...
- by Bharat
Sat Dec 04, 2010 11:11 am- Forum: Data Sufficiency
- Topic: Need Help in this DS
- Replies: 3
- Views: 1222
Hi Paritosh, The original cube comprises 1000 unique 1-unit-cubes of which 488 unique 1-unit-cubes are on its outer surface. -> The drum has 1000 cubes, of which 488 are painted red on one more surfaces. -> Probability of desired event = 488/1000 = 1/2 (approximately) Explanation: If you peel the su...
- by Bharat
Sat Dec 04, 2010 11:04 am- Forum: Data Sufficiency
- Topic: Cube Problem
- Replies: 5
- Views: 2451