6th Brain Teaser: The Board and the Dominoes

Interesting brain teaser presented by Serguei Vorojtsov. Subscribe to my newsletter at
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[rastal200618]

mr. vorojtsov . i hve a quetion to you.. if peters mother has five childs namely keli,kile,kela,akel and ______ who is the fifth child..? answer it quickly... now

[vorojtsov]

Peter?

[wig3]

It can't be done, each dominoe has to cover 2 squares of different colours, you have removed diagonally opposite corner squares which are the same colour, therefore it cannot be done. The only way it can be done is to place the final dominoe diagonally acrossthe last two squares and stand the last dominoe on its edge, but it's cheating.

[vorojtsov]

Thank you for the correct solution!

[spiddo]

You can't do it. A domino piece covers 2 neighboring squares. On chess board you always have black square next to white square, thus a domino piece can cover one black and one white piece. By removing 2 opposite squares you remove 2 squares of same color. For example you'll get 32 black squares and 30 white ones. With 30 domino pieces you will cover all but 2 black squares which you cannot cover with last domino piece.

[06MyWorld]

@dominicjan you cant do it

[thezimboman]

i subscribed to your site, Serguei but I can't find those free downloads!!!!

[bigfanowarriors]

@rastal200618 lake?

[ericcartmankicksass1]

I notice this "chess board" is 2 7x7 squares put on top of each other.

[haroeris1]

i can do it with 30 dominoes

[Carbunkal]

we know that both squares are the same color since they are diagonal from each other. when you lay a domino down it has to touch one black square and one white square. assuming that the two squares removed were white, this would mean that somehow we would need one domino to cover two black squares, which is impossible. same is true if both were black squares.

[hundike1]

ez just make one go diagonal

[Racksor]

how the heck do you wanna get a half domino???

[nikigadev]

lol this can`t be done xD and about 20 people sayd : this was very easy I done it

[drummerjc1995]

well that was easy