I've lost 15 seconds of my life.

My father is only fifteen years old.

Unfortunately, by the time we got there the train had been gone for fifteen minutes.

Experts say only about 15 percent of happiness comes from income, assets and other financial factors.

Fifteen per cent of the housing will be affordable, so that low-income families will be able to buy or rent homes in the area.

In the Ming Dynasty (early 15th century) the centre of Beijing was the Forbidden City.