## Similarities / Isomorphic Questions

To solve these types of questions you are looking for a similarity of form or structure between 2 clue symbols and looking to replicate these elements in an answer symbol.

The word 'Isomorphic' is from Ancient Greek, with 'isos' meaning equal and 'morphe' meaning shape

You need to look at the elements of the symbols in relation to outlines, shading, line thickness, orientation (i.e. which direction the symbol is ‘pointing’), size, and position in relation to other parts of the main symbol. The number of each of these elements is important too.
In fact, you need to observe all the usual NVR suspects!

Example 1

What observations do we notice about these usual suspects in this example?

1. Both clue symbols have a solid external black line – discount as looking for differences.
2. Both clue symbols have a white fill – again, discount as looking for differences.
3. Both clue symbols are a different size.
4. Both clue symbols contain identical internal shapes.
5. The fifth answer symbols internal shape matches the clue symbols.

What logical steps can we make when we apply these observations to the code letters?

• Size, external shape and size are not relevant to this answer.
• Only the internal shape gives us a logical clue as to which symbols are similar in form.
• Following observation 4 and 5, the answer will be e