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There are only 8 numbers in the series. So, the ans is C.

Although we can add the numbers to arrive at the answer, back solving works the best here. 50 are on botany, 65 are on zoology, 90 are on physics. 50 are on geology, and 110 are on chemistry We can add 50, 50 and 65 straight away to get 165. => even if we pick 165 books those can still be from Botany, Geology and Zoology. 166 will not work on similar lines. To test choice D, 285: 285-165 = 120. => Physics and Chemistry can contribute 60 each. The only remaining answer is E.

I beleive it will be 5^4 if the question were to ask, "In how many ways can 4 fingers wear 5 rings?"

Thanks!!

5 rings, 4 fingers 1st ring can be worn on any of the 4 fingers => 4 possibilities 2nd ring can be worn on any of the 4 fingers => 4 possibilities 3rd ring can be worn on any of the 4 fingers => 4 possibilities 4th ring can be worn on any of the 4 fingers => 4 possibilities 5th ring can be worn on any of the 4 fingers => 4 possibilities Total possibilities = 4*4*4*4*4 = 4^5.

First I tried to do it quick and arrived at the wrong answer and then while I was typing the solution I realized what I mis-calculated. It has taken me about 3 mins to get it right. Overall, what this Q has taught me is to first lay out all the information on paper and think actively for a few seconds about the best way to arrive at the answer. A quick look at the answer choices, {(1) 1: 36: 48 (2) 1: 40: 48 (3) 1: 41: 24 (4) 10: 19: 12}, tells me that I need to calculate my way through to the answer as the choices 1,2,3 are pretty close. In the end, if we look at the problem, it is only a bunch of multiplications by 60.

1.68 hrs = 1 hr + 0.68 hrs = 1hr + 40 mins + .8 mins = 1hr + 40mins + 48 secs 0.68 hrs = 0.68*60 mins = 40.8 mins 0.8 mins = 0.8*6 = 48 secs.

The ans is (2). 1st one week: loss of 1% => of 24*7 = 168 hrs we loose 1.68 hrs => at the end of 1st week, the time is off by 1 hr 40 mins and 48 secs 2nd week: gain of 2% => 168*2/100 = 3.36 hrs = 3 hrs 21 mins and 36 secs total gain over 2 weeks = 3hrs 21 mins 36 sec - 1 hr 40 mins 48 secs = 2hrs 80 mins 96 secs - 1 hr 40 mins 48 secs = 1hr 40 mins 48 secs

This is a question that was left unanswered in one of the earlier posts: "Six cards numbered from 1 to 6 are placed in an empty bowl. First one card is drawn and then put back into the bowl.then a second card is drawn. If the cards are drawn at random and if the sum of the numbers on the cards is 8, what is the probability that one of the two cards drawn is numbered 5 ? NO OA" My answer is 1/3 because, for the total to be 8, the outcomes should be (6,2) or (5,3) or (4,4). Any comments?

Everything is correct except volume of the cylinder is pi*r^2*h Going by the same route: Volume to be fillled = 1/4(pi*r^2*10) 1 marble's volume = r/10 r/10 -------------------- 1 marble 1/4(pi*r^2*10) --------- ? marbles = (1/4(pi*r^2*10))/(r/10) = 25*pi*r marbles Next step is to calculate the time it took to drop these marbles: 12 marbles ------- 60 seconds 25*pi*r marbles ---- ? seconds = 25*pi*r*60/12 = 125*pi*r seconds So, it takes 125*pi*r seconds to fill the bucket. For overflow, the boy must drop atleast one more marble which takes 5 seconds. S0 ans is 125*pi*r + 5 seonds for overflow. Closest answer: 300r(pi) - D

My preference is for D. Here is my analysis to reach at D: A. housing prices will rise only if interest rates fall - "only" is not implied by Ronald's statement B. if interest rates fall, housing prices must rise - no indication of "must" C. interest rates and housing prices tend to rise and fall together - no evidence of this E. interest rates are likely to fall significantly in the next six mont - no evidence of this

Ans has to be E. s = speed d = distance travelled t = time taken from the both the statements together, s(M) = 0.9*s(L) d(M) = d(L) - 30 Since we are interested in the time it takes M and L to travel to the destination: t(L) = d(L)/s(L) t(M) = (d(L)-30)/0.9*s(L) Since we cannot compare t(L) and t(M) the ans has to be E.

The answer should be A. from 1, (x-3)(x-2) 2 cases are possible: 1. x-3 0 => x2 => 2 2. x-3 > 0 and x-2 x>3 and x not possible So, the only possibility is 2 for sure whether 2 from 2, 5x(x-5) > 0 => 2 cases are possible: 1. 5x 0 => x5 => not possible 2. 5x > 0 and x-5 x>0 and x 0 So, the only possibility is 0 say for sure whether 2 Therefore the ans is A.

In an effort improve the quality of patient care, Dr. Lydia Temoscho is directing one of several clinical research projects that seek to determine the extent that psychological counseling helps to supplement the medical treatment of serious disease. (A) seek to determine the extent that psychological counseling helps to supplement (B) seek to determine how helpful psychological counseling is in supplementing © seeks to determine how helpful psychological counseling is to supplement (D) seeks to determine to what extent psychological counseling is a help in supplementing (E) seeks to determine the extent that psychological counseling is helpful in supplementing I got his wrong and after some research, I found out that plural verb (seek) is used after some thing like "one of + some plural subject (projects) + relative clause(that)"