1. How many people are there in the world? (Round to the nearest billion.) 

• 7 billion
• 6 billion
• 5 billion

• 1 billion
• 800 million
• 700 million

• 6.25 percent--1/16th of the world's population
• 14.3 percent--1/7th of the world's population
• 25 percent--1/4th of the world's population

Score =

Correct answers: