Question

Nisha's age is 5 years more than her brother's age. If Nisha is currently 18 years old, what is her brother's age?

Answer 1

Step-by-step explanation:

Let nisha's present age be x,

Asha's present age =x

2

+2

When Nisha turns her mother's age, x

2

+2−x years have passed. Asha's age =10x−1

⇒x

2

+2−x = 10x−1−[x

2

+2]

⇒2x

2

−11x+5=0

⇒(x−5)∗(2x+1)=0

⇒(x−5)=0 or (2x+1)=0

⇒x=5 or x=

2

−1

Since age can not be negative,

x=5 is the right answer.

Nisha's age is 5, Asha's age is 27

Sum of their present ages =5+27=32

Answer 2

Nisha's age is 18 years and she is 5 years older than her brother

her brother age is

18-5=13.

Ans.=13