10 identical capacitors are connected as shown. The capacitance.... between A and B. (See image)

This question can be solved using symmetry.

Imagine a perpendicular line passing from  A to B at point N. 

Now find the equivalent capacitance between A and N. (The result otained should then be multiplied by 2)

 

Between A and N... you have C/2 and just opposite to it at the top you have again C/2 rest remain the same as C. If there was an option of posting a pic I could have but the option of posting a photo seems to be unavailable.