When a girl is 10, her sister is 4. When the girl is 60, what will her sister be?
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Correct Answer: 54
Condition 1:
Girl age = 10 ; Sister age = 4
So here age difference is 6 years
Condition 2:
Girl age =60
so Sister age = Girl age -6?
           =60-6=54
Hence Sister age is 54