I'm not completely sure there is enough information here to solve these puzzles, if not I'll add hints until someone solves it. Rules: The numbers $1$ to $12$ appear once each. The numbers on the perimeter are the row/column totals The greater/lesser signs indicate just that.

A recent question about Programming a Prolog solver for a Master Mind type problem generated a question about a scoring rule ambiguity for Master Mind, which is not solved by the Wikipedia page entry for "Master Mind" Suppose you have this situation, with letters a stand-in for color: If you ha...

This word square is composed of nations, all in the same continent, written either horizontally or vertically. There is no overlap, each square belongs to exactly one nation. However, the country names are anagrammed. Please find the continent and all the nations. B C R O O M O C I U N D U S A A...

!Solve This]1—+—=8 × — ×—=9 = = — 5 Solve this plz

I have 9 boxes, every turn exactly 4 of them will be shaded. Given the following sequence what will be the results for entries 9 and 10.

You have two 4 liter jugs and one 5 liter jug. You can fill up a jug to its full capacity, empty it or pour one jug into another one until the jug you pour into is full or the jug you pour from is empty. Find a sequence of filling, emptying and pouring that results in 2 liters in both 4 liter j...

Found this puzzle online. Tried many possible combinations of numbers with multiplication, addition etc. Has anyone ever solved this?

This square is composed of elements, all in the same set, written either horizontally or vertically. There is no overlap, each letter belongs to exactly one word. However, the words are anagrammed. Please find the words, and the specific smallest recognised set which includes these. STREVIES CED...

You’re an agent for the very secret PSE – Protection against Stupidity Establishment. The agency tries to prevent people doing stupid things, before they do them. You’ve been given a random email account and been told to wait for your next instructions, which you know will be hidden. Finally, t...

You're presented with a five-by-five grid of dots. Each dot is assigned a label from 1 to 25 going across the rows and down. Thus, the top-left dot is number 1; the bottom-left dot is 21. Your job is start at dot number 1 and to go from dot to dot and draw a picture. How do you know what dot ...