its more of a logic question(adsbygoogle = window.adsbygoogle || []).push({});

its used in my country in the "asat" exam

i need to solve this kind of in a minute an a half

the question is :

mary bought ten books

5 pairs of books

each pair of books has its own colors

a yellow pair ,a purple pair ,a black pair ,a blue pair, a red pair (10 books )

she decided to arrange them on 4 shelves ,but there are rules for arranging them

two books of the same color will not be on the same shelf

a yellow book cannot be on the same shelf with a purple shelf

a blue book will always be with a red book

in each shelf the amount of books will not exceed 3 books

what arrangement cannot happen if we know that on one self we have a purple and a blue books?

A.there is another shelf which has a purple and a blue book on it

B.there is a black book next to a red book

C.there is a yellow book next to a black book

D.there is a purple book next to a black book

i need to choose one of the answers

i am looking for a forum on this kind of questions

where should i look for?

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# Where can i find forum that solve these kind of questions

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