OPINION: Minister of State Josephine Teo has a maths puzzle on car ownership for Singaporeans to solve

Channelnewsasia Forum, 5 Feb 2013
At the start of 2008, there were some 515,000 cars.
At the end of 2012, there were about 618,000, with nearly one in two households owning a car.
In 2008, two in five households owned a car.
The Ministry of Transport estimates that currently, fewer than one in 10 households own more than one car.
(Note: about 1.15mil resident households in 2011 from Stat.SG)
Question: How many households have more than 1 car?

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