I've rewritten the arithmetic perpetuity calculator to be more user friendly with cleaner math. It will solve for Present Value, Arithmetic Payment, or First Payment for either animmediateordueperpetuity with arithmetic progression. At this time, it does not solve for interest rate, but if that is needed in the future, I could build something.

I've included our automated quiz generator as well on version 2.0.

Arithmetic Perpetuities