About how many spiders are in 1 acre of green space? (100 / 50 000 / 100 000)
50 000
Which countery has no rivers at all? (Brazil / South Korea / Saudi Arabia)
Saudi Arabia
Which is the only African city with a subway system? (Nairobi / Cape Town / Cairo)
Cairo
Why is the Australian town Coober Pedy unusual? (nobody lives there / it has 3 rivers / it's completely underground)
Because it's completely underground
Which type of food museum is in Rome? (pasta/ chocolate / pizza)
pasta
Which City has more bicycles than people? (Paris / Tokyo / Amsterdam)
Amsterdam
How many ants are there for any person in the world? (1000 / 1 million / 6 million)
1 million
About how many people ride by train per day in Mumbai, India? (500 000 / 1 million / 6 million)
6 million