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Puzzle 1 


What number comes next in this sequence:

302 · 202 · 102 · 002 · 991 · ?

Puzzle Copyright © Kevin Stone

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Puzzle 2 


Drone Racingall logic puzzles

After the recent BrainBashers drone racing contest, the four contestants were congratulating each other.

Only one drone had the same race number as the position it finished in.
Adrian's drone wasn't painted yellow, or blue.
Andy's drone beat Avery's drone, whereas Alex's drone beat the drone with race number #1.
The drone painted green (Alex's) finished second, and the drone painted blue had race number #4.
The drone that had race number #3 was painted red, and beat the drone that finished third.
Avery's drone had race number #1.
Can you work out whose drone finished where, its race number, and the colour it was painted?

4 x 4 blank grid

Puzzle Copyright © Kevin Stone

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Puzzle 3 


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 C H O O L

Note: this puzzle is not interactive, and the squares cannot be clicked.

Puzzle Copyright © Alan Stillson and Frank Longo

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Puzzle 4 


Starting with COLD, change one letter at a time until you have the word WARM.

Each change leaves the other letters in their original places and must result in a common word.

What is the minimum number of steps required to achieve this change?

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