Iron Sharpening Iron

And the original sketch in my church bulletin: 

Proverbs 27:17 (ESV) says "Iron sharpens iron, and one man sharpens another." For some reason, one of the times I read this verse I thought of laundry irons, and this comic happened.

Explanation: To sharpen an iron weapon, you need something of equal or greater hardness, such as iron tool. This verse is saying you need strong friends (equally as strong or greater than your own strength). But sharpening can also mean mental improvement, hence the pop quiz one iron is giving the other. 

Text:
I1: 5 times 5! When Columbus sailed the ocean blue! Red mixed with yellow!
I2: 25! 1492! Orange!