### Procedure Solver

Can you think like a computer and work out what this flow diagram does?

### Notty Logic

Have a go at being mathematically negative, by negating these statements.

### Mind Your Ps and Qs

Sort these mathematical propositions into a series of 8 correct statements.

# Not Another NAND!

##### Age 14 to 18 Challenge Level:

The NAND gate is said to be universal. This means that the effect of any other logic gate can be replicated using just NAND gates.

Prove that this is indeed the case: replicate AND, OR, XOR, XNOR, NOR, NOT gates using just NAND gates.

Are any of the other types of gate universal? Prove it.