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In a family, each boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. How many children are there in the family?
 one year ago
 one year ago
In a family, each boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. How many children are there in the family?
 one year ago
 one year ago

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kmeds16Best ResponseYou've already chosen the best response.1
@Decart show me the solution please :)
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
Ah ok I got it by fingers. But is there any mathematecal equation to solve this kind of problem? Its like a riddle.
 one year ago

campbell_stBest ResponseYou've already chosen the best response.0
there are 7 children, 4 boys and 3 girls...
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
@campbell_st can you show me your solution?
 one year ago

campbell_stBest ResponseYou've already chosen the best response.0
plenty of options...
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
i find this quite tricky..
 one year ago

DecartBest ResponseYou've already chosen the best response.0
two equations two unknowns
 one year ago

campbell_stBest ResponseYou've already chosen the best response.0
if you rewrite Decarts equations you have y = 1 and 0.5y  x = 1
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
oh wait. im still trying to figure it out. its tricky :/
 one year ago

campbell_stBest ResponseYou've already chosen the best response.0
for me it was trial and error knowing that there needed to be an odd number of children I knew 3 doesn't work, 5 works for the boy having equal sisters and brothers but doesn't work for the girl, so try 7 works
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
 thats probably the best way i've got a headache trying to create the equations
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
maybe i need another coffee  lol
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
@cwrw238 haha, my brother too. until he left me here alone :/
 one year ago

DecartBest ResponseYou've already chosen the best response.0
brother = x+y sister=x+.5y
 one year ago

DecartBest ResponseYou've already chosen the best response.0
.5y when we took one away
 one year ago

DecartBest ResponseYou've already chosen the best response.0
brother is actually x+1
 one year ago

DecartBest ResponseYou've already chosen the best response.0
x+1brother has x1+y x1 being himself
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
1 + 2x = x + y where x = girls, y = boys is one equation
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
that gives x + 1 = 1 + 2x giving x=0
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
i formulated an equation XD x  1 = y y  1 = x/2
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
x  1 = 0.5y is another so u have 1 + 2x = x + y x 1 = 0.5y is that right??
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
@cwrw238 i'll try to solve yours & you try mine :)
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
yes that gives x = 3 y=4
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
x  1 = y y  1 = 0.5x add x  2 = 0.5x x = 4 y = 41 = 3
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
in your equation x = boys , y = girls right? yours come out right too
 one year ago

kmeds16Best ResponseYou've already chosen the best response.1
ya and yours is x = girls and y = boys,right?
 one year ago
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