These kidnappers just come up with a big number that they think the family can pay.

They couldn't come up with a concrete number for anything.

Well then why don't you and I try to come up with a number on our own?

"I don't think we know enough to come up with a number."

The team was given one minute to come up with a set number of correct answers.

They came up with a number of solutions, but none were satisfactory.

While they came up with a number of solutions, none were satisfactory.

There were none to help me come up with an actual number, either.

The quandary for him isn't simply that another group has come up with a different number.

I checked through the records to come up with an exact number.