Problem

Using numbers 1,2,3,6 and 12 (once each) and operations of subtraction and division, obtain 36.

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Form is valid through March 2016

Solution

Dear visitors, thank you for your numerous answers. Thank you also for proposing new solutions, more elegant that I have planned initially. The first to send correct solutions were James, Mo Braga, Olivier, Can, Christian and David. Well done!

Serge Hazanov

Here is my solution:

12/(1-2/(6-3)) = 36