Has a Sudoku with 16 clues finally been discovered? How good are you at Sudoku?
It is supposed to be impossible for a "Sudoku" with 16 clues to have a unique solution. Try to solve the Sudoku below before you look here:
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The “Sudoku” below has 16 clues and two solutions. However the two solutions appear to only swap around the 8s and 9s. Since there are no 8s or 9s in the original puzzle does this mean the solution is unique?
It is believed that there is no Sudoku with 16 clues i.e. with a unique solution. It was mathematically proven in 2012 by Gary McGuire and his team that 17 is the minimum number of clues possible for a valid Sudoku puzzle to have a unique solution; puzzles with 16 or fewer clues cannot have only one solution.
What about this puzzle?
Time to Tickle Your Thinker 🧠
If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?
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Poll: As a customer, what do you think about automation?
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Automation (or the “unpaid shift”) is often described as efficient ... but it tends to benefit employers more than consumers.
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Are you for, or against?
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9.6% For. Self-service is less frustrating and convenient.
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43.2% I want to be able to choose.
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47.1% Against. I want to deal with people.
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We’re talking tyres, paint, and agricultural chemicals — the items that aren’t always easy to dispose of.
Recently featured in The Post, this innovative business is showing how waste can be transformed into opportunity, turning what we throw away into products.
But this raises a bigger question: how do we get our waste to the right people — the ones doing the right things with it?
♻️ Do you think Auckland Council is doing enough to help households safely dispose of hard-to-recycle waste and get it back into the supply chain?
We’d love to hear your thoughts.
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5% Yes!
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77.6% No.
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17.4% For some products.
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