# PP Presentation

## A set of four 3x5 cards is dealt on a table as shown below. Each card has a letter on one side and a number on the other.

## The dealer of the cards proposes that they satisfy the rule:

## “If there is a vowel on one side of the card, then there is an odd number on the other.”

## What is the smallest number of cards you have to turn over to see if the rule is satisfied?