If you hop or shuffle sideways while remaining the same distance from the middle, this movement would describe a circle, no matter how many there are – so the correct answer would be 1. To draw an accurate circle this way would require exceptional multitasking skills. Perhaps instead a rotating platform?

If everyone were to remain stationary however, mathematically there is no such thing as a ‘circle’ jerk – even if everyone on the planet were involved. The radius of this ‘circle’ would btw be approx 500,000 km, provided everyone stood shoulder to shoulder – so clearly this is not going to happen in our lifetimes unless there’s a mbumive population drop and then a big post apocalypse get-together.