Question 314509
Look at the differences between successive numbers.
{{{ 5-4=1 }}}
{{{8-5=3}}}
{{{13-8=5}}}
{{{20-13=7}}}
{{{29-20=9}}}
You see the pattern?
A series of odd numbers
The next difference would be 11.
{{{29+11=highlight(40)}}}
The next number is 40.