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kmeds16
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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?
 2 years ago
 2 years ago
kmeds16 Group Title
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?
 2 years ago
 2 years ago

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kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
@Decart show me the solution please :)
 2 years ago

kmeds16 Group TitleBest 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.
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
boys = x girls = y
 2 years ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.0
there are 7 children, 4 boys and 3 girls...
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
@campbell_st can you show me your solution?
 2 years ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.0
plenty of options...
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
i find this quite tricky..
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
two equations two unknowns
 2 years ago

campbell_st Group TitleBest ResponseYou've already chosen the best response.0
if you rewrite Decarts equations you have y = 1 and 0.5y  x = 1
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
oh wait. im still trying to figure it out. its tricky :/
 2 years ago

campbell_st Group TitleBest 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
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
 thats probably the best way i've got a headache trying to create the equations
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
but we can get them
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
maybe i need another coffee  lol
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
@cwrw238 haha, my brother too. until he left me here alone :/
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
brother = x+y sister=x+.5y
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
.5y when we took one away
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
sister = 2x+y
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
brother is actually x+1
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
x+1brother has x1+y x1 being himself
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
1 + 2x = x + y where x = girls, y = boys is one equation
 2 years ago

Decart Group TitleBest ResponseYou've already chosen the best response.0
x+1+y=y1+2x
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
that gives x + 1 = 1 + 2x giving x=0
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
i formulated an equation XD x  1 = y y  1 = x/2
 2 years ago

cwrw238 Group TitleBest 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??
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
@cwrw238 i'll try to solve yours & you try mine :)
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
yes that gives x = 3 y=4
 2 years ago

cwrw238 Group TitleBest 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
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
in your equation x = boys , y = girls right? yours come out right too
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
ya and yours is x = girls and y = boys,right?
 2 years ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
yea well done
 2 years ago

kmeds16 Group TitleBest ResponseYou've already chosen the best response.1
thank you @cwrw238 :)
 2 years ago
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