CAT
Exam
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?
Read Solution (Total 7)
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- see that 5 girls and 16 boys satisfies. so total 21 children. Wow!
- 13 years agoHelpfull: Yes(5) No(3)
- 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 - 13 years agoHelpfull: Yes(5) No(2)
- sunday is the answer...because one day is common between their two's schedule to speak lies and truth and its sunday.
- 13 years agoHelpfull: Yes(0) No(1)
- 16......let B=3B and 4S
bhatati=4B and 4S
So3+4=7 and includin on the LHS B and S its 16 - 12 years agoHelpfull: Yes(0) No(1)
- 16......let B=3B and 4S
bhatati=4B and 4S
So3+4=7 and includin on the LHS B and S its 16
- 10 years agoHelpfull: Yes(0) No(1)
- @dimple:
Can u please explain how u derive 4(x-1) from 2nd condition
How x-1 came - 9 years agoHelpfull: Yes(0) No(0)
- 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
- 7 years agoHelpfull: Yes(0) No(0)
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