official cat 2018 by IIMs (Quant)

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Approach

Post 6134236191391744
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Approach?

Post 5415213971537920
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kumar_ami8
@kumar_ami8  ·  0 karma

factors of 10800 = 2^4 x 3^3 x 5^2     factors of 30 = 2x3x5 , there are 24 factors which is multiple of 30. if 30 is multiplied by 3, it will make it divisible by 90 also so to find out multiple of 30 only 3 has to be removed. so (2x3x5)(2^3 x 5^1) so total nubmer of foactors which is multiple of 30 but not 90 is (3+1 *1+1) = 8

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In how many ways can 4 parrots be put in 4 cages, each meant for a particular parrot, such that none of the parrot goes in it's own cage?

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karancool93
@karancool93IIM Calcutta  ·  865 karma

9 ways?

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yk99
@yk99  ·  57 karma

9 ways

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Explain with steps

Post 5035617382039552
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karancool93
@karancool93IIM Calcutta  ·  865 karma

A??

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Plz give me the details solution Thank you!!

Post 4786682553958400
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amar-rajput
@amar-rajput  ·  539 karma

5pi

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karancool93
@karancool93IIM Calcutta  ·  865 karma

@amar-rajput damn, yes, its 5pi......

forgot to divide by 4

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Explain

Post 5916423386300416
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akashsateesh
@akashsateesh  ·  34 karma

40

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karancool93
@karancool93IIM Calcutta  ·  865 karma

yup, 40

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If l, m and n are three integers and x denotes sum of squares of l, m and n and y denotes sum of squares of reciprocals of l, m and n. If p denotes the smallest value of xy, find the value of p 

7
8
9
None of the above
6 answers
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In q. 7 i took proportion to be 3 : 6 :: 1 : 2. I am not getting the correct answer can any one tell me where i am going wrong ? Thanks in advance :)

Post 5337355225923584
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karancool93
@karancool93IIM Calcutta  ·  865 karma

is the answer D?

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 If |x-4| + |y-4| = 4 ,then how many integer values can set (x,y) have? 


Infinite
5
16
9
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Both x^2+16x-q=0 and x^2-11qx+25=0 have real roots. Find the number of positive integral solutions for x.

a)39      b)70     c)60     d)64

process please.

bitchplease
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