April 2019

Threading Through Math History

Marin Mersenne: 1625 Europe’s Version of a

Wiki; and How Safe is Your I.R.A.?


Problem of the Month –

Twin Primes

 Numbered Pentominoes– a fusion puzzle.

Target Practice Plus

Simple arithmetic, but keep looking.

Let’s Solve One Together:

Target Practice Plus Unwrapped!

UB: A Memoir of Uncle Bob Mead.

Now available at the iBooks Store. Also, Uncle Bob’s own store is now open where the book will be available for purchase in pdf format, along with sets of 50 of UB’s regular puzzles (published individually since 2005).


Department of Words

Ferriswords a carnival of letters with very few words.

Five and Ten – choices, choices ... and a final answer called for.

Fit for Four – one word for ...

Crisscross Crunch – a big puzzle in a small space.

Minicryptic 7s5s3s Crossword

where we don't mean half of what we say.

MiniCryptic Tutorial – where we explain the other half (will open in another window).

Solutions for April

Best Math Sites Archives: 2015 | 2016


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