Answer :
When I was 2 years old, my sister was 1/2 my age ==> she was 1 ==> she will
always be 1 year younger than I am, and she will never be able to catch up to me.
Now I am 100, so my sister must be 99 .
always be 1 year younger than I am, and she will never be able to catch up to me.
Now I am 100, so my sister must be 99 .
