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# Category Archives: Puzzles

## Introducing Raymond Smullyan

One day, when a speaker was introducing logician and puzzlist Raymond Smullyan, he remarked that “Professor Smullyan is unique.” Smullyan, who was feeling playful that day, said, “I’m sorry to interrupt you Sir but I happen to be the only … Continue reading

## What’s Next?: An Unorthodox Number Sequence

0, 0, 0, 0, 4, 9, 5, 1, 1, 0, 55, 55, 1, 0, 1, 9, ? What is the next number in the sequence?

## A Riddle From Isaac Newton?

Horace Walpole (1717-1797) sent the following riddle to Lady Ossory, claiming that it was composed by physicist and mathematician Isaac Newton: Four people sat down at a table to play; They play’d all that night, and some part of next … Continue reading

## Another Poem With A Hidden Acrostic

In the September 29, 1888, edition of Weekly Wisconsin, the following strange enigma appeared, composed by an anonymous writer named “Maude”: Perhaps the solvers are inclined to hiss, Curling their nose up at a con* like this. Like some much … Continue reading

## 1-2-3-4 Puzzle

Using the digits 1, 2, 3, 4 twice, form an eight-digit number in such a way that there is one digit between the 1’s, two digits between the 2’s, three digits between the 3’s and four digits between the 4’s.

## Conundrum

The following couple of verses would be familiar to those who know the nursery rhyme As I was Going to St. Ives. As I was going to Handover Fists I met a man with seven wrists. The seven wrists had … Continue reading

## Different Mathematical Perspectives

Here is a very simple match puzzle. Move just a single match to form a perfect square. This is indeed an easy puzzle. However, there are two ways to solve this and the solution depends on who’s solving the puzzle.