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This would depend on how old she was when he was born.
For example if she was one year old when he was born, then at two years old she would be twice his age, If she was four at his birth, then when she is eight she will be twice his age.
(See the related question which was the actual exercise.)
What else can I help you with?
Mary who is sixteen years old is four times as old as her brother. How old will Mary be when she is twice as old as her brother?
Mary will be 24 and her brother will be 12 !
Mary is sixteen and is four times as old as her brother how old is the brother?
her brother is 4 years old
Krishna twelve years old is three times as old as his brother. How old will Krishna be when he is twice as old as his brother?
Krishna is 12 and three times as old as his brother, who must be 4. In 4 years time when Krishna is 16 he will be twice as old as his brother, who will then be 8.
Mike is three times as old as his little sister Mary. In 4 years he will be twice as old as Mary. How old is Mike?
Mike is 12. Mary is 4. In 4 years, Mike will be 16 and Mary will be 8. So Mike will be twice as old as she is in four years.
John twelve years old is three times as old as his brother How old will John be when he is twice as old as his brother?
John will be 16.
Mary who is sixteen years old is four times as old as her brother. How old will Mary be when she is twice as old as her brother?
Mary will be 24 and her brother will be 12 !
Mary is sixteen and is four times as old as her brother how old is the brother?
her brother is 4 years old
Mike is three times as old as his little sister Mary in 4 years he will be twice as old as Mary how old is Mary?
Mary is 4 years old. [A+]
Krishna twelve years old is three times as old as his brother. How old will Krishna be when he is twice as old as his brother?
Krishna is 12 and three times as old as his brother, who must be 4. In 4 years time when Krishna is 16 he will be twice as old as his brother, who will then be 8.
If Three years ago Mary was three times as old as her sister now Mary is twice as old as her sister how old is Mary now?
Mary is dead
Marry who is 16 years old is 4 times as old as her brother how old will marry be is twice as old as her brother?
24
Mike is three times as old as his little sister Mary. In 4 years he will be twice as old as Mary. How old is Mike?
Mike is 12. Mary is 4. In 4 years, Mike will be 16 and Mary will be 8. So Mike will be twice as old as she is in four years.
John twelve years old is three times as old as his brother How old will John be when he is twice as old as his brother?
John will be 16.
. Mike six years old is twice as old as his brother. How old will Mike be when he is one and a half times as old as his brother?
9
Mike six years old is twice as old as his brother how old will mike be when he is one and half times as old as his brother?
9 years
Mike six years old is twice as old as his brother How old will Mike be when he is one and a half times as old as his brother?
9
Mike is three times as old as his little sister Mary In 4 years he will be twice as old as Mary How old is Mike?
12,4...16,8
