### Submit a Resource

• Write the numbers 1 to 6 in a horizontal row. You (Player A) will play the Big Bad Wolf who is
Player B.
• Every time it is your turn, you can take any number in the list, as long as at
least one factor of that number is also in the list.
• You get your number and the Big Bad Wolf gets all of the factors of that number that are on the list. For example, if you take a 4, the Big Bad Wolf would get 1 and 2 since those are the factors of 4 left in the list.
• The Big Bad Wolf must get something every time, which means you cannot choose a number if
no factors of the number remain in the list. When no number in the list has any factors
left in the list, the game is over and the Big Bad Wolf gets all the numbers that are left in the
list.

### Variation

Try Big Bad Wolf with the numbers 1–10 or the numbers 1–12. Can you find a winning strategy for any string of number?

Paper and pencil

## Reference

From Helping with Math at Home: More Ideas for Parents. 2006. Portsmouth, NH: Heinemann.

Multiplication & Division
K-6, Middle School, High School

## Organization

youcubed (Stanford University)

Challenge