In total, there are 36 + 25 + 16 + 9 + 4 + 1 = 91 squares. In general, the total number of squares, represented by A, in a similarly divided square with side length n can be written as: ...

Which number must be inserted in place of the incorrect number? Show puzzle solution The number 75 must be replaced by the ...

Embracing everything from riddles and logical conundrums to mathematical problems and optical illusions, he notes that "it ...

Every puzzle associated with the shortcuts can ... What you'll find is that all the numbers present are square numbers. So, ...

Sliding Numbers: Sliding puzzle game to arrange the cards in ascending ... Chess Knight: direct the knight to touch all the squares of the chess board with the least number of movements.

NPR's Ayesha Racsoe plays the puzzle with Puzzlemaster Will Shortz and KNPR listener Lisa Rock of Las Vegas, Nev.

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

Explore daily insights on the USA TODAY crossword puzzle by Sally Hoelscher. Uncover expert takes and answers in our ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

I think that’s my favorite puzzle that I’ve proposed. Maybe 10% of respondents got it correct — it was a shockingly low number. I got this one wrong ... “second moment,” where you average the squares ...