Logic Worksheet - Grade 7/8, University Of Waterloo printable pdf download

Logic Worksheet - Grade 7/8, University Of Waterloo

University of Waterloo

Centre for Education in

Faculty of Mathematics

Mathematics and Computing

Grade 7/8 Math Circles

Fall 2010

Logic

Opening Problem

Arthur’s family is baking gingerbread cookies for their annual Christmas party. They

have baked 100 cookies, but it seems that someone has eaten one. Detective D.W.

interviews each memeber of the family and gets two clues from each of them:

Arthur:

it was Pal

it wasn’t Mom

Kate:

it was Arthur

it was Dad

Pal:

it was Kate

it wasn’t Mom

Mom:

it wasn’t Pal

it was Dad

Dad:

it wasn’t Arthur

it wasn’t Pal

Each person is telling one exactly one truth and one lie. Who ate the cookie?

Logic problems are problems that can be solved using reasoning or argumentation.

Tips for solving logic puzzles:

Read and re-read the question; underline or highlight important words.

Keep in mind what it is that you are being asked to ﬁnd.

Watch out for irrelevant information.

List out all of the possibilities if you can. Use a chart or draw a diagram if

appropriate.

Start to eliminate options.

Take it one step at a time

Logic Worksheet - Grade 7/8, University Of Waterloo