Mary will be 24 and her brother will be 12 !
her brother is 4 years old
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.
9 years
Sarah is 16 years old. Her brother is x years old. She is four times as old as her brother, so 4x = 16. Divide each side by 4, so x = 16/4 = 4. Her brother is 4 years old.
If Mike is 6 years old and twice as old as his brother, then his brother is 3 years old. When Mike is one and a half times his brother's age (1.5 * 3 = 4.5), he will be 4.5 years older than his brother. Therefore, Mike will be 6 + 4.5 = 10.5 years old when he is one and a half times his brother's age.
her brother is 4 years old
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.
9 years
Sarah is 16 years old. Her brother is x years old. She is four times as old as her brother, so 4x = 16. Divide each side by 4, so x = 16/4 = 4. Her brother is 4 years old.
24
If Mike is 6 years old and twice as old as his brother, then his brother is 3 years old. When Mike is one and a half times his brother's age (1.5 * 3 = 4.5), he will be 4.5 years older than his brother. Therefore, Mike will be 6 + 4.5 = 10.5 years old when he is one and a half times his brother's age.
John will be 16.
9
24 (they will be 12)
9
9
The ages are 8 and 4