July’s DoodleProblem

July 24, 2015 — Leave a comment

This month’s problem can be solved by pre-schoolers in seconds, but it can take maths professors much longer:

1235 = 0
2678 = 3
3668 = 4
9000 = 4
8000 = 5
3218 = 2
6777 = 1
8888 = 8
1568 = ?

The solution: count the number of enclosed spaces within each digit.

1, 2, 3, 5, and 7 have no enclosed spaces

6, 9 and 0 have one enclosed space

8 has two.

4 has 1 or 0 depending on what font you are reading this in – so I left this digit out.

No Comments

Be the first to start the conversation!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s