Apologies for spamming. Sharing some good links for Quant from PG.
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Concepts...total fundas!! (Closed)
http://www.pagalguy.com/discussions/conceptstotal-fundas-25023536
mind blowing concepts@quant
http://www.pagalguy.com/discussions/mind-blowing-conceptsquant-25010313
Mind Blowing Questions: Season 2 (Closed)
http://www.pagalguy.com/discussions/mind-blowing-questions-season-2-25015003
[cat 2010]concepts ,fundas and tips to crack quants section (Closed)
http://www.pagalguy.com/discussions/cat-2010concepts-fundas-and-tips-to-crack-quants-section-25055747
Number System (Closed)
http://www.pagalguy.com/discussions/number-system-25000852
Escalator problems
http://www.pagalguy.com/discussions/escalator-problems-25016652
Cube problems (Closed)
http://www.pagalguy.com/discussions/cube-problems-25008332
doubts in permutation & combination (Closed)
http://www.pagalguy.com/discussions/doubts-in-permutation-combination-25010050
Quant Topic Wise Discussion CAT 2009 (Closed)
http://www.pagalguy.com/discussions/quant-topic-wise-discussion-cat-2009-25037553
official quant thread for CAT 2009 (Closed)
http://www.pagalguy.com/discussions/official-quant-thread-for-cat-2009-25035696
Official Quant thread for CAT 09-II [July 09 onwards] (Closed) http://www.pagalguy.com/discussions/official-quant-thread-for-cat-09-ii-july-09-onwards-25042674
Official Quant thread for CAT 09-III (September onwards) (Closed) http://www.pagalguy.com/discussions/official-quant-thread-for-cat-09-iii-september-onwards-25044541
Official Quant Thread for CAT 2010 (Closed)
http://www.pagalguy.com/discussions/official-quant-thread-for-cat-2010-25047731
http://imgur.com/DveATo1
23 and 25 ..number system
Remainders
Questions regarding finding remainders have appeared a lot of times. Here are few ways by which u can find the remainders quickly
1)EULER'S THEOREM:
If M and N are two co-prime nos. and N=a^P*b^q*c^r. where (n)=N*(1-1/a)*(1-1/b)*(1-1/c).
Then remainder M^(n)/N=1
For example:
Find the remainder when 5^37 is divided by 63
5 and 63 are co primes,
63= 3^2*7
So, (63)= 63*(1-1/3)*(1-1/7)
=36
Therefore , remainder( 5^37/63) = remainder (5^36*5/63)
=1*5
=5
It's a very easy concept, apply it on other nos and try to find the remainder
2)FERMAT'S THEOREM
If P is a prime number and N is prime to P, then (N^P-N) is divisible by P
e.g: what is the remainder when (N^7-N) is divided by 7
ans. 0
3)WILSON'S THEOREM
If P is a prime no. then remainder (P-1)!+1/P=0, which means that remainder when (P-1)! Is divided by P is P-1
For example: remainder when 40! Is divided by 41
= 41-1
= 40
The number of ways 5^7 can be expressed as a product of 3 factors
On a chessboard of 64 small squares. In how many ways can u select two squares of the same dimension such that they have a common side? 168 228 288 348 114
First six odd naturals are raised to the power of 10 and sum S computed. Find the remainder on divisibility by 13.
what is the coeff. of x^987 in the expansion of {x+x^2+x^3+x^4+.............x^1200}^234
Find all pairs (a,b) of non-negative integers for which:
a^2 + 2*3^b = a [2^(b+1) -1]
Sorry for posting my query on this thread but I need as many pair of eyes on this as possible. I'm a 2014 jobless (got placed in two big mnc's but had to drop their job offers due to some reason) GEM pass out with average acads all throughout. Gave cat 14 and converted pgdm finance at lal bahadur shastri instt of management. Now I'm in a dicey situation here. I had my interview at HCL yesterday for a pkg of 2.75 lpa and the result is awaited. 25 April is the last date to submit the first installment for the fees at the college. My query is whether I should submit the fees or not?
Q. [No OA] [Please share your approaches]
1 + 3 + 7 + 13 + 21 + 31 ..... 100th term ?
D and E are two points on the sides AC and BC respectivly of triangle ABC such that DE 18 cm, CE 5 cm and angle DEC 90 degree. if tanABC=3.6 the AC:CD
BC:2CE
2CE:BC
2BC :CE
CE:2BC
- Three friends A, B and C play a game in a pub. The rules are simple. Whenever there is a contest between any two of them, the one who has a higher percentage alcohol should pour 200 ml of his wine into the one having lower percentage alcohol. The game starts as a contest between A and B, then B and C and then C and A. Post this, the game continues in the same cycle on and on. If a player has emptied all his alcohol, then the remaining two play the game with the same rules. If two players have the alcohol of the same percentage level, the younger one pours 200 ml of his alcohol into the elder one's glass. All three of them start the game with 600 ml of wine. A's wine has 60% alcohol, B's has 48% alcohol and C's has 50% alcohol. They take 3 minutes to play one round of this game. D, a fourth friend leaves the pub immediately after the game begins, returns after an hour and drinks wine from the person who has the highest alcohol percentage. What is the concentration of the alcohol that D had?
A lump of 2 metals weighing 18g is worth Rs 87. If their weights be interchanged , it would be worth Rs 78.6. If the price of one metal is Rs 6.7 per gram , find the weight of the other metal in the mixture.