A number of other differences exist in the Japanese version.
"We found that the same number of stores existed before as after."
This means that for any choice of only one possible number can exist.
I didn't come up with anything better, true, but these numbers might as well not exist.
A number of student and leadership groups exist at the school.
A number of pressure groups also exist on the island.
A number of legends exist about the church and its history.
A number of sites have existed for at least 50 years.
This means at least one more prime number exists beyond those in the list.
A number of models existed throughout the world during 1982 to 1990.