I present to you a deck of 4 cards. Each card has on one side a letter of the alphabet, and on the other side a single digit from 0-9.

I propose a hypothesis that may apply to this deck:
If the letter is 'E', then the number on the other side is '4'.

I then drop the 4 cards on the table, and you see: 'B', '7', 'E', '4' (on the respective cards).

Which of the 4 cards must you turn over to verify or disprove my hypothesis?

The problem simply lays down a single hypothesis, that is as follows

Quote : "

I propose a hypothesis that may apply to this deck:
If the letter is 'E', then the number on the other side is '4'.

"

In order to verify the above hypothesis, the card with the 'E' must be turned over and checked for a '4'. If a '4' is found then the hypothesis is verified.

As no other hypothesis is made we need not check any other card.

Simple :)

Posted by Ujjawal on 2005-03-11 13:16:04