English joke: an exact number (exact number)

A tourist visited New Mexico and was surprised by the dinosaur bones everywhere.

How old are these bones? The tourist asked an elderly Native American.

He acted as a guide.

100 million and three years old.

How can you be so sure? The tourist asked.

good

The tour guide replied

A geologist passed by and told me that these bones have a history of 100 million years.

That was exactly three years ago. 103. Accurate figures.

A tourist is visiting New Mexico. He was surprised at the dinosaur fossils everywhere.

How old are these fossils? The tourist asked an elderly local American. He is a tour guide.

It has been thirteen years.

How can you be so sure? The tourist asked.

"Oh," replied the tour guide, "a geologist has been here. He told me that these fossils have a history of one billion years, and that was three years ago."