From Michael Phelps winning eight gold medals at the 2008 Beijing Olympics to Nadia Comăneci receiving the first perfect 10 in 1976, there have been several unforgettable moments in Olympic history.

As hundreds of world-class athletes prepare to compete in the 2012 Summer Olympic Games beginning July 27, Patch is celebrating the start of the games by posting Olympic trivia questions all this week.

Check answers here.

1. Which country has won at least one gold medal in every Summer Games?

• The United States
• China
• Australia
• Great Britain

2. What colour of medal was presented to the winners in the first modern Olympics in 1896?

• Gold
• Silver
• Bronze
• Copper

3. Who won a gold medal for the 100 meter in 1924 and was featured in the film Chariots of Fire?

• Usain Bolt
• Muhammad Ali
• Harold Abrahams
• Steve Prefontaine

4. Which of these colors is not on the Olympics flag?

• Black
• Blue
• Red
• Brown