Vietnam has four runways
There are no paved runways in Antarctica. Airplanes land on skis, not wheels, on runways of ice.
there are 5 runways.
Honolulu International Airport has six runways.
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7
Changi Airport has two parallel runways, 02L/20R and 02C/20C.
3.
It varies according to demand.
If you mean runways, there are three.
There are 5 runways at Toronto Pearson International.
visual runways, non-precision instrument runways, and precision instrument runways