Lock Quest: Agent Zero's Briefcase

The briefcase is open!

The latches snap open. Inside are sunglasses for every member of your team and a note: "Welcome to the agency. Your first mission starts at recess."

You are now a Lock Master. Go tell your teacher!

Your mission

Agent Zero locked her briefcase five ways and hid the clues all over headquarters: the elevator, the vault cameras, the briefing room, a hallway floor, and her own desk. Nothing is labeled. Look closely, talk it over with your team, and work out what each clue is for. Every agent knows the three rules for what to do first: do what is inside ( ) first, then multiply, then add and subtract from left to right. Agents who just work from left to right fall into the traps.

How to crack a lock

• Pick any lock from the menu at the top. You can solve them in any order.
• Read every clue before you start. One clue alone is never enough.
• Use scratch paper. Draw pictures, make lists, and cross things out.
• Tap the buttons to build your answer. Then press "Try the lock".
• A lock will not tell you which part is wrong, so be sure before you try.

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