My local greengrocer is a would-be mathematician.
He likes to arrange his apples in nice rows.
However, when he lays his apples in rows of 3 he has one left over.
When he lays them in rows of 5 he also has one left over.
Remarkably he also has one left over when he arranges them in rows of 7 and 9.
11 seems to be the magic number, for, in rows of 11 there are no apples left over.
How many apples does the greengrocer have?