Latest CAT Aptitude Question SOLUTION: Ours is a big family. I have thrice as many brothers as sisters and my sister Bharathi has four times as many brothers as sisters. How many children do my parents have?

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(#M40002220) CAT question simple problem Keep an EYE

Ours is a big family. I have thrice as many brothers as sisters and my sister Bharathi has four times as many brothers as sisters. How many children do my parents have?

Asked In CAT pavanjaiswal (12 years ago)

Unsolved Read Solution (7)

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Read Solution (7) :

suchandra raavi  (12 years ago)

see that 5 girls and 16 boys satisfies. so total 21 children. Wow!

Is this solution Helpfull? Yes (5) | No (3)  

Dimple  (12 years ago)

If x is no of girls, then
no of boys = 3x+1 ..........as per first condition and= 4(x-1) as per cond 2.
and hence
no of boys = 3x+1= 4(x-1)
so x=5, and boys =16

Is this solution Helpfull? Yes (4) | No (2)  

pratik dasa  (12 years ago)

sunday is the answer...because one day is common between their two's schedule to speak lies and truth and its sunday.

Is this solution Helpfull? Yes | No (1)  

Browns MN  (12 years ago)

16......let B=3B and 4S
bhatati=4B and 4S
So3+4=7 and includin on the LHS B and S its 16

Is this solution Helpfull? Yes | No (1)  

Chirag Ranjan Lahiri  (9 years ago)

16......let B=3B and 4S
bhatati=4B and 4S
So3+4=7 and includin on the LHS B and S its 16

Is this solution Helpfull? Yes | No (1)  

Tanvi joshi  (8 years ago)

@dimple:
Can u please explain how u derive 4(x-1) from 2nd condition
How x-1 came

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soumik  (6 years ago)

Answer is 21. 5 girls and 16 boys. The main confusion lies whether to think the speaker as a boy or a girl.But as you see, in second case, the number of boys is 4 times which is more than the case 1 where it was 3 times. So it is safe to assume that the speaker is a boy. So, S+3S+1= (S-1)+4(S-1)+1 i.e S=5

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