PGDCM paper Discussion...

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Hi puys...lets discuss the pgdcm paper out here...Those who have not download the archive..download it from here :: :: http://www.pagalguy.com/forum/quantitative-questions-and-answers/16338-quantitative-questions-day-101-150-a-46.html#post5...
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Some observation wrt question 2
if log a, log b and log c are in AP then a,b, c are in GP
log b - log a = log c - log b
log b/a = log c/b
b/a = c/ b=> a,b and c are in GP.

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2 answer is log10 to base 2
26) (n-1)!/n
take all the prime numbers 2



26) take all the prime numbers 2
Include number 4 also in the above list .....

Hence option 3)
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26. The number of positive integers n in the range 2 -1)! is not divisible by n is:
(1) 0 (2) 7 (3) 8 (4) 17
27. The number of squares that can be formed using the adjacent squares of a chess board is:
(1) 64 (2) 71
(3) 160 (4) None of the above.
28. If log 3, log (2x - 1) and log (2x + 1 + 7) are in arithmetic progression, then a possible value of x is:
(1) 10 (2) 20 (3) log102 (4) log210
29. If y = logz(x - 3)2, where z = ex, then dy/dx at x = 4 is equal to:
(1) 4 (2) 1/4 (3) e (4) 1/2
32. For what values of a, will the following system of simultaneous equations have exactly three solutions?
x2 - y2 = 0; (x -a)2 + y2 = 1
(1) a = 1 (2) a = 2
(3) a = 3/2 (4) None of the above


2 answer is log10 to base 2
26) (n-1)!/n

take all the prime numbers 2
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26. The number of positive integers n in the range 2 -1)! is not divisible by n is:
(1) 0 (2) 7 (3) 8 (4) 17

27. The number of squares that can be formed using the adjacent squares of a chess board is:
(1) 64 (2) 71
(3) 160 (4) None of the above.

28. If log 3, log (2x - 1) and log (2x + 1 + 7) are in arithmetic progression, then a possible value of x is:
(1) 10 (2) 20 (3) log102 (4) log210

29. If y = logz(x - 3)2, where z = ex, then dy/dx at x = 4 is equal to:
(1) 4 (2) 1/4 (3) e (4) 1/2



32. For what values of a, will the following system of simultaneous equations have exactly three solutions?
x2 - y2 = 0; (x - a)2 + y2 = 1
(1) a = 1 (2) a = 2
(3) a = 3/2 (4) None of the above

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viccy_776 Says
yaar 22 kaa funda kya hai??


There are two circle external tangent......and there is an external tangent to both circle.....find the attachment..now i hope you cud solve....the question is asking the length of OD.....which is 48/11 ans..
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solve the next set..

20. Each page of a book is printed and numbered serially on both sides in the usual manner, that is, the front side of the first page is numbered 1, the back side of the first page is numbered 2, and so on. Of course, as usual, there is a possibility that the book ends at the front side of the last page in which case only the front side of this page is numbered and the back side of this page is left blank. The book has one of its pages missing. The total of the remaining page numbers is 15000. What is the last page number in the complete book?
(1) 172 (2) 173
(3) 174 (4) Can not be determined.


okay what are the page numbers of torn page


23. Three friends A, B and C have each a habit of telling lies occasionally. The probability of telling truth for any of them is p. Let q = 1 - p. A has come to know about a fact as true or false. He tells it to B, who tells it to C. C tells us. Let P be the probability that the fact as told by C to us is true. How many of the following statements are wrong?
Statement I : P = p - 2pq (p - q)
Statement II : P = p3 + 3 pq2
Statement III : P = 1 - q (3p2 + q2)
(1) 3 (2) 2 (3) 1 (4) 0

I think all are correct.just cheked for p=1 and p=0

24. Consider the following four statements A, B, C and D.
A : Any horse is gentle if it has been well trained.
B : Any horse is well trained if it is gentle.
C : Any horse is gentle if and only if it has
been well trained.

D : No horse is gentle unless it has been well trained.
Which one of the following statements does not hold?
(1) A and B together imply C.
(2) C implies both A and B.
(3) D implies A.
(4) D implies B.

25. Consider the following four statements A, B, C and D.
A : A horse is gentle if it has been well trained.
B : A horse is gentle only if it has been well trained.
C : Some horses are gentle even though they have not been well trained.
D : Some horses that are well trained are not gentle.
Which one of the following statements is correct?
(1) A, B and C are simultaneously true.
(2) A, B and D are simultaneously true.
(3) A, C and D are simultaneously true. (4) None of the above is true.
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20 173
21 48
22 48/11


yaar 22 kaa funda kya hai??
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solve the next set..

20. Each page of a book is printed and numbered serially on both sides in the usual manner, that is, the front
...

20 173
21 48
22 48/11
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got 2 answers
20 - 173
21. - 48 sq. cm.
for the next one, there is a formula for the length of the tangent. use that and u will get the answer

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21. A triangle ABC with an obtuse angle B is inscribed in a circle. The altitude AD of the triangle is tangent to the circle. The side BC has length 12 cm. and the segment BD has length 4 cm. What is the area of the triangle ABC?
(1) 48 sq. cm. (2) 60 sq. cm.

(3) 36 sq. cm. (4) None of the above.

Ans:
db.dc=da^2 => da=8

Area of abc = area DAC - area DAB
= 1/2*16*8 - 1/2*8*4 = 48 ans
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