Question 1157470
Description is not enough.


age p for the person making the description
age v for the great-grandmother

<pre>
PEOPLE              AGE
First Person         p
Mother               p+4p=5p
Grandmother         24+(5p)  and  24+5p=v-40
Greatgrandmother     v
</pre>
Not possible to exactly find age of any of them.


Notice there is ONE equation in two variables.  A reasonable example for p could be p=5 for First Person.  This will give:
Mother is 25
Grand Mother is 49
GreatGrand Mother is 79