How many children does Emma have?
Ana is a Girl , she has the same amount of sisters as brothers. Andrew is a Boy , he has twice the amount of sisters than brothers. Ana and Andrew are both children of Emma. How many children does Emma have?
The answer is 7.
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1 solution
If x is the amount of boys that Emma has, then Andrew has x - 1 brothers, Because Andrew has twice the amount of sisters than brothers he has 2x - 2 sisters.
The only intergral solution for this is when x = 3 And because the amount of Andrew's sisters Is the amount of girls that Emma have. And Andrew has 4 sisters. Therefore 3 + 4 = 7 And Emma has 7 children.