201
Question: How old is the first airplane?Answer: 1903
202
Question: How old is the first car?Answer: 1885
203
Question: How old is the first mobile phone?Answer: 1973
204
Question: How old is the first laptop?Answer: 1973
205
Question: How old is the oldest existing building?Answer: 5,000
206
Question: How old is the oldest known book?Answer: 5,500
207
Question: How old is the oldest existing tree?Answer: 5,000
208
Question: How old is the universe?Answer: 13.8 billion
209
Question: How old is the sun?Answer: 4.6 billion
210
Question: How old is the moon?Answer: 4.5 billion