How many Trailhead Playground can I have in a single account? There is a limit of 10?
#trailhead #playground

How many Trailhead Playground can I have in a single account? There is a limit of 10?
#trailhead #playground

I'm doing the Set Up the Exchange Rate hands-on but keep getting an error. I've doublechecked thing and I'm still getting this message  
Challenge Not yet complete... here's what's wrong:  
We couldn’t find Currency Type and Decimal with the correct information. Ensure that you have selected the correct currency type and entered the decimal information.

I am having an issue with this challenge as well, I am doing everything it asks and don't see what I'm doing wrong.  The instructions are:
Dataset: DTC Opportunity
Add Group: Close Date (Year-Month)
Add Group: Forecast Category
Change Measure: Count of Rows to Sum of #
Filter by: Closed Equals False
Chart Type: Timeline
Lens Name: Sales Pipeline Overview

I double checked I am saving to My Exploration and copy and pasted the title exactly from the instructions.  HELP!