Question 918152
<pre>
The grandmother was born in the 1900's and her grandmother would have
been born in the 1800's.

The grandmother was x years old in 1950,
She was born in the year 1900+x
Therefore we have the equation

1950 - her birth year = her age

      1950 - (1900+x) = x
          1950-1900-x = x
                 50-x = x
                   50 = 2x
                   25 = x

So the grandmother was born in 1900+x = 1900+25 = 1925
And she was 25 in 1950.


The grandmother's grandmother was y years old in 1950,
Therefore she was born in the year 1800+y
Therefore we have the equation

1950 - her birth year = her age

      1950 - (1800+y) = y
          1950-1800-y = y
                150-y = y 
                  150 = 2y
                   75 = y

So the grandmother's grandmother was born in 1800+y = 1800+75 = 1875
And she was 75 in 1950.

[Note, we could have just done the second part because the problem
didn't ask anything about the grandmother, but only about the
grandmother's grandmother's age in 1950.]

Edwin</pre>