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Balancing the Books

Stage: 3 Short Challenge Level: Challenge Level:1

A tourist attraction, which opens every day, needs 30 000 visitors per day on average to break even. Last week there were 120 000 visitors.

What is the number of visitors needed this week to break even over the two-week period?

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.