When I was 4 years old my sister was half my age, now am 100 how old is my sister? 

3 Answers

baxthum8's profile pic

baxthum8 | High School Teacher | (Level 3) Associate Educator

Posted on

Your sister is 2 years younger than you as when you are 4 she is 2(half  your age); therefore when you are 100 your sister is 98 years old.

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

When you were 4 years old, your sister was half your age. Half of 4 is 2, your sister was 2 years old when you were 4 years old or she is 2 years younger to you.

Your present age is 100, as your sister is 2 years younger to you, she is 98 years old.

atyourservice's profile pic

atyourservice | Student, Grade 11 | (Level 3) Valedictorian

Posted on

` 4-:2 = 2` so you sister is 2 years younger than you

100-2=98   she will be 98