BrainBashers™ is a collection of brain teasers & Japanese-type puzzles, optical illusions, and other fun stuff.
BrainBashers has items such as: Daily BB Words, logic puzzles, Sudoku, stereograms, magic games, memory games, mazes, typing tests, and so much more. Including a pointless box and a blank page!
puzzles
illusions
fun stuff
BB Testers: would you like to be a BrainBashers tester, and test Daily Stars, a new daily puzzle?
There is a wide range of things to do every single day. Take a look at the site map to see a list of everything, or perhaps choose a random page instead.
Daily Puzzle – Nov 11
What shape completes the bottom line?
triangle pentagon square
square hexagon hexagon square
pentagon hexagon hexagon hexagon square triangle
hexagon octagon octagon octagon octagon ?
Puzzle Copyright © Kevin Stone
workings
hint
answer
print
www.brainbashers.com
/puzzle/zgoe
share
Hint
Look at the number of sides of each of the shapes.
Answer
Square.
Reasoning
If we add the shape's sides, the total increases by 8, then 10, then 12, etc (2 more each time).
triangle (3) + pentagon (5) + square (4) = 12
square (4) + hexagon (6) + hexagon (6) + square (4) = 20
pentagon (5) + hexagon (6) + hexagon (6) + hexagon (6) + square (4) + triangle (3) = 30
Therefore:
hexagon (6) + octagon (8) + octagon (8) + octagon (8) + octagon (8) + square (4) = 42
Alternative Reasoning
Square the first shape's sides, and the remaining shapes add up to this number.
triangle (3 x 3) = pentagon (5) + square (4)
square (4 x 4) = hexagon (6) + hexagon (6) + square (4)
pentagon (5 x 5) = hexagon (6) + hexagon (6) + hexagon (6) + square (4) + triangle (3)
Therefore:
hexagon (6 x 6) = octagon (8) + octagon (8) + octagon (8) + octagon (8) + square (4)
All daily items change at midnight GMT. set time zone
New And Updated Stuff
These items were new / updated in the last 14 days. I also have a more complete list of new / updated items.
Brain TeasersUPDATED – LAST 7 DAYS
New / updated brain teasers twice a month.
Black HoleNEW ILLUSION – LAST 14 DAYS
Does the hole appear to grow larger?