Leila and Sahar are attending a dinner party with four other couples. Each attendee knows their partner, but they may or may not know anyone else there. Before the five couples sit down to eat, anyone ...

The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...

A new math puzzle designed to challenge readers of all ages is coming to the Daily Press. David Genter, a puzzle developer ...

Holidays bring celebration, rest and, for many families, long stretches of indoor time. For some, this means tabletop games quickly reappear on kitchen tables. Games provide opportunities for learning ...

Puzzle 1: You are given nine gold coins that look identical. You are told that one of them is fake, and that this coin weighs ...

Here, count with me: 1, 2, 3, 4, 5, 6, 7, 8, 9, T, 11, 12 … Oh, what’s that? You write ten with “zero”? Fair enough. Zero, we have been told, is the ...

Math puzzles PRO 2 increases your logical thinking. Hi! I’m Keza MacDonald, a video games journalist of 15 years’ experience with two small kids and a teen stepkid. I’m… Hello, my darlings! It is me, ...

In 1974, a geneticist named Marsha Jean Falco devised an ingenious research tool to help determine whether epilepsy in dogs was an inherited trait. She drew a series of symbols on index cards, where ...

I’ve been out of school for decades, and I don’t spend my days solving equations (I’m more of a word person). Still, I like to think I have a solid grip on basic math: I can usually gauge whether a ...

Once upon a time, four queens known as the queens of blue, red, green and pink were locked in a bitter feud. The monarchs lived on four islands, all the same size, yet each with its own distinctive ...