Q 01/05

The Great Pyramid of Giza was the world's tallest human-made structure for roughly how long?

A) About 500 years

B) More than 3,700 years

C) About 1,200 years

D) About 2,000 years

Answer · why

B) More than 3,700 years

It was built for Pharaoh Khufu around 2600 BC from an estimated 2.3 million blocks and originally stood 146.6 metres tall.

Q 02/05

Roughly how many large stone blocks were quarried to build the Great Pyramid?

A) 230,000

B) 800,000

C) 10 million

D) 2.3 million

Answer · why

D) 2.3 million

Together they weigh about six million tonnes; white limestone casing came by boat from Tura.

Q 03/05

The Empire State Building was structurally completed how many days after construction began?

A) 180

B) 730

C) 410

D) 1,095

Answer · why

C) 410

Al Smith drove the final rivet, made of solid gold, and the building opened on May 1, 1931.

Q 04/05

According to official accounts, how many workers died building the Empire State Building?

A) Five

B) None

C) Fourteen

D) Forty-two

Answer · why

A) Five

More than 3,500 people worked on it at its peak, including many Mohawk ironworkers from Kahnawake near Montreal.

Q 05/05

The Burj Khalifa in Dubai stands how tall to its roof, including the spire?

A) 610 m

B) 720 m

C) 780 m

D) 828 m

Answer · why

D) 828 m

Its design is based on the Hymenocallis desert flower, and its concrete pours used a specially built super-high-pressure pump.