| Hint | Answer | % Correct |
|---|---|---|
| Countries that have at least a billion people | China | 98%
|
| Countries that have at least a billion people | India | 97%
|
| Amazing quiz website that surpassed 1 billion quizzes taken in 2024 | JetPunk | 97%
|
| It happened about 13.8 billion years ago, according to scientists | The Big Bang | 85%
|
| Part of the body that contains an average of 86 billion neurons | Brain | 83%
|
| It travels 1 billion kilometers in about 55 minutes | Light | 78%
|
| The only country (so far) to issue a banknote with a face value of 1 billion dollars | Zimbabwe | 56%
|
| Type of star that the sun will become in about 5 billion years, growing so large it might engulf the Earth | Red giant | 49%
|
| Founder of Standard Oil who became the first American with a net worth of $1 billion | J. D. Rockefeller | 46%
|
| Prefix that represents one billion in the metric system | Giga | 45%
|
| By age 30, you will have had about 1 billion of these in your lifetime, fewer if you are a conditioned athlete | Heartbeats | 44%
|
| Prefix that represents one billionth | Nano | 42%
|
| A billion times a billion (spell it out) | Quintillion | 40%
|
| The most common bird in the world – with a population of around 26 billion | Chicken | 30%
|