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An egg is about fifty grams.

There were fifty passengers on board the bus.

The train is traveling at the rate of 50 miles an hour.

My father finally learned to drive when he was fifty.

Our ancestors arrived in this country 150 years ago.

My school library has a collection of 2.5 million books.

There was a phone call from a 50-year old man who had been told he had a year left to live due to heart disease.