320  Age
2

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Mary is 10 years older than Jerry. 3 years ago, Mary was 6 times as old as Jerry then. How old is Mary?



Mary is 15 years older than Jerry. 4 years ago, Mary was 4 times as old as Jerry then. How old is Mary?



Mary is 20 years older than Jerry. 4 years ago, Mary was 5 times as old as Jerry then. How old is Mary?



Mary is 10 years older than Jerry. 4 years ago, Mary was 6 times as old as Jerry then. How old is Mary?



Mary is 15 years older than Jerry. 5 years ago, Mary was 6 times as old as Jerry then. How old is Mary?

Mary is 12 years older than Jerry. 4 years ago, Mary was 4 times as old as Jerry then. How old is Mary?



Mary is 15 years older than Jerry. 5 years ago, Mary was 4 times as old as Jerry then. How old is Mary?



큰형은 작은형보다 18 살이 더많고, 6 년전에는 큰형나이가 작은형에 4 배였을때, 현재 큰형의 나이는 몇살인가?



Mary is 6 years older than Jerry. 7 years ago, Mary was 4 times as old as Jerry then. How old is Mary?



Mary is 24 years older than Jerry. 8 years ago, Mary was 7 times as old as Jerry then. How old is Mary?

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