The instructor was trying to drive home some truths,"Figures can't lie," he declared.
"For instance, if 1 man can build a house in 12 days, 12 men can build it in 1 day."
A puzzled student interrupted:
"Then 288 men can build it in 1 hour, 17,280 in 1 minute, and 1,036,809 in 1 second."
While the instructor was still gasping, the ready reckoner went on:
"And if 1 ship can cross the Atlantic in 6 days,
6 ships can cross it in 1 day. 'Figures can't lie,' can they?"