Puzzle 1
Place letters into the grid such that every row, column, and 2 x 2 block has letters (in any order) that form a common word. Each letter is only used once, and no letter is repeated in the rows / cols / blocks.
Letters allowed: S H O W E R S
| A | T | F | |
| A | |||
| G | N | U | |
| D | E |
Note: this puzzle is not interactive, and the squares cannot be clicked.
Puzzle Copyright © Alan Stillson and Frank Longo
Puzzle 2
Can you find a 5-digit number that has no zeros, and no repeated digits, where:
The first digit is a prime number.
The second digit is the fifth digit minus the first digit.
The third digit is twice the first digit.
The fourth digit is the third digit plus three.
The fifth digit is the difference (larger − smaller) between the first digit and the fourth digit.
Don't forget that 1 isn't prime, as the prime numbers start with 2, 3, 5, …
Puzzle 3
Can you draw a continuous line that goes through every number in order, starting with 1, and ending with 6?
You can only move horizontally and vertically, every square must be visited, and the line must not cross itself.
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Puzzle Copyright © Cihan Altay
Puzzle 4
A well-known seven-letter word can be created, by starting with a single letter and adding a letter, one at a time, then mixing the letters, each time making a proper word. Using the clues below, which are not necessarily in the correct order, can you find all seven words? For example, A, AT, TAR, RATE, etc.
Expressing position within limits of space and time.
The subject of self-consciousness.
Frozen atmospheric vapour falling to earth.
To utter musical sounds with the voice.
Cause to oscillate.
Scattering on the earth.
The breaking of divine law.