Question 359548
Look at the first differences,
{{{d1=81-68=13}}}
{{{d2=x-81}}}
{{{d3=113-x}}}
{{{d4=132-11=19}}}
Looks like the second differences vary from each other by 2. 
So the missing values should be 15 and 17.
{{{x-81=15}}}
{{{x=96}}}
.
.
{{{113-x=17}}}
{{{x-96}}}
.
.
{{{highlight(x=96)}}}