Permalink Submitted by VishwasLearningMaths on June 19, 2021

I had come across this problem in the past, and had learnt via experimentation using two coins that the answer is (circumference of stationery circle ÷ circumference of moving circle) +1. However your theoretical explanation really helped in understanding the underlying principles.

## Crisp and clear explanation

I had come across this problem in the past, and had learnt via experimentation using two coins that the answer is (circumference of stationery circle ÷ circumference of moving circle) +1. However your theoretical explanation really helped in understanding the underlying principles.