Question

Fresh and invigorated after completing her algebra homework, Mini appeared at the living room door. She held a piece of paper covered in scribbled numbers and equations. "Dad!" she announced. "Five years from now you'll be only double my age!" "Amazing!" Dad almost looked up from the TV, but knew she hadn't finished. "But five years ago, you were triple my age then!" "I suppose in another ten years we'll be the same age," Dad grunted, changing channels. How old is Mini?

Answer 1

Answer:

15 Years

Step-by-step explanation:

Five years from now you'll be only double my age

But five years ago, you were triple my age

Let say Mini current Age = M

5 Years ago Her Age = M  - 5

5 years  ago Her Father Ahe = 3 (M - 5)

5 years from now Mini Age = M + 5

5 years from Now father Age = 2 (M + 5)

From 5 years ago to 5 years from now , father age will increase by 10

=> 2(M + 5) = 3 (M-5) + 10

=> 2M + 10 = 3M - 15 + 10

=> M = 15

Mini Current Age = 15 Years  

5 Years Ago she was 10 Years , her father was 30 years

5 Years from now she will be 20 Years & her father = 40 Years

her father current age =  35 Years

After 10 Years

Mini will be 25 Years  & Father will be 45 Years

but not the same age that's why dad grunted