AboutSurajit Basu Expertise I can answer questions which are mathematical, logical, or wordplay related.
I am not good at highly creative problems, or riddles.
Experience I regularly do puzzles, and help out friends, teenagers. I read books written by Martin Gardener. I love the puzzles and Easter eggs in Douglas Hofstadter's Godel, Escher, Bach: an enternal golden braid.
Publications A few examples of my writing:
http://surajitbasu.sulekha.com/blog/post/2006/04/the-journey-down-the-number-line.htm
Education/Credentials B. Tech. ( Computer Science), IIT Kanpur, India
MBA ( Post-Graduate Diploma in Business Management), (Finance, Systems), IIM Calcutta, India
Question in one family there are several children in which each boy has as many sisters as he has brothers but each girl has brothers which are twice of sisters she has then how many brothers and sisters are they?
Answer n one family there are several children in which each boy has as many sisters as he has brothers but each girl has brothers which are twice of sisters she has then how many brothers and sisters are they?
Suppose there are B boys and G girls.
We know each boy has as many sisters as he has brothers.
How many sisters does each boy have?
Of course, it is
.. think ....
Each boy has G sisters.
How many brothers does each boy have?
Of course, it is
.. think ....
Each boy has (B-1) brothers.
We know each boy has as many sisters as he has brothers.
So, G = B-1.
We know each girl has brothers which are twice of sisters.
How many brothers does each girl have?
Of course, it is
.. think ....
Each girl has B brothers.
How many sisters does each girl have?
Of course, it is
.. think ....
Each girl has (G-1) sisters.
We know each girl has brothers which are twice of sisters.
So, B = 2 * ( G-1)
We also know ( Earlier) that G = B-1.
Thus, B = 2 * ( G-1)
Replacing G with B-1 we get
B = 2 * ( B-1 -1)
i.e. B = 2B - 4
i.e. B = 4.
So, G = 3.
Try it out imagining you are one of the brothers, and one of the sisters.
