Challenge Questions Blog

Challenge Questions

Stop in and exercise your brain. Talk about this month's Challenge from Specs & Techs or similar puzzles.

So do you have a Challenge Question that could stump the community? Then submit the question with the "correct" answer and we'll post it. If it's really good, we may even roll it up to Specs & Techs. You'll be famous!

Answers to Challenge Questions appear by the last Tuesday of the month.

Previous in Blog: The Line Illusion (September 2026 Challenge Question)  
Close
Close
Close
3 comments
Rate Comments: Nested

Breaking up a horseshoe (Oct. 2026 Challenge Question)

Posted October 01, 2026 12:00 AM
Pathfinder Tags: challenge question

You have this iron horseshoe. You are also a talented machinist.

1. Can you cut this horseshoe into 6 different pieces, using two straight cuts, without repositioning the workpieces?
2. Can you cut this horseshoe into 6 different pieces - each piece with a hole - using two straight cuts? Yes, you can reposition the workpieces.

Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
3
Guru

Join Date: Apr 2010
Location: About 4000 miles from the center of the earth (+/-100 mi)
Posts: 9930
Good Answers: 1147
#1

Re: Breaking up a horseshoe (Oct. 2026 Challenge Question)

10/01/2026 10:37 AM

1. Can you cut this horseshoe into 6 different pieces, using two straight cuts, without repositioning the workpieces?

Here's the first part...

Reply Good Answer (Score 3)
4
Guru

Join Date: Apr 2010
Location: About 4000 miles from the center of the earth (+/-100 mi)
Posts: 9930
Good Answers: 1147
#2

Re: Breaking up a horseshoe (Oct. 2026 Challenge Question)

10/01/2026 10:51 AM

2. Can you cut this horseshoe into 6 different pieces - each piece with a hole - using two straight cuts? Yes, you can reposition the workpieces.

Make cut1.

Rotate bottom piece 90 degrees and move it between the two top pieces

Make cut2 across all three pieces between the holes.

Reply Good Answer (Score 4)
Guru

Join Date: Mar 2011
Location: Sebastopol, California
Posts: 1215
Good Answers: 55
#3

Re: Breaking up a horseshoe (Oct. 2026 Challenge Question)

10/01/2026 11:22 PM

I can get 8 pieces with 3 cuts and no holes.

__________________
Most people are mostly good most of the time.
Reply
Reply to Blog Entry 3 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

Previous in Blog: The Line Illusion (September 2026 Challenge Question)  

Advertisement