Probably about 500, however it depends on what you consider a gym. Visit gymcost.co.nz for a comprehensive list of gyms in new zealand.
there are 29 Mcdonalds are in Auckland
There are 49 volcanoes in Auckland and 48 active ones but I don't know how many dormant volcanoes there are in Auckland.
16 gyms 8 in johto and another 8 in kanto.
8 gyms in Johto 8 gyms in Kanto 8+8=16 16 gyms
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Auckland City has a population of 440 000. The greater Auckland area has a population of 1.3 million
Auckland, New Zealand - 419.3 sq miles.
There are 48 active, dormant and extinct volcanoes in Auckland.
This kind of question is almost impossible to answer... There is no 'register' of gyms in the UK - new gyms are opening daily, and old ones are being closed.
The number of schools which have gyms in America is unknown. An article in the New York Times reported that Indiana has the largest high school gyms in America.