hello there i need help in explaini the following iq question,,,,,,

[ahmad209]

hello there i want expalanaitions for that questions por favor, El Señor...
i want 2 ask here if i have any problem in iq question /.......can i introduce it in this section gree subject test :mathematics or is there other section to write the questions that any one can help me.................
those are questions i hope any one can help me


1- 4 books are arranged on a book shelf . the positions of the books are numbered 1 throgh 4 ,from the left to right . for the following pair of conditions , how many possiblr orderings are there ? c sits to the right of b . b sits next to d only if b sits next c ?(4-6-8-10-12) answer:4<<<how is that


2- A cupboard has five shelves numbered 1 through 5 , from bottom on top ...each shelf has 2 compartements. there are 8 items A,B,C,D,E,F,G,H in the cupboard , no two of which are in the same compartement .items D and Eare on the same shelf . B is on the shelf directly below G . if a shelf contain only one item , it cannot be directly above or directly below another shelf that contains only one item . C is the only item on one of the shelves . there is only one item on the fourth shelf . which one of the following is a complete and accurate list of the items any one of which could be on the top shelf ?
( D- D,E,G,C - D,E,G,B - D,E,G,C,F -D,E,G,H,F,A ) answer: D,E,G,H,F,A<<<<<how is that

[lime]

It is ok to post your question here. But I really want to mention, that according to the way you're writing your questions, there is little chance you will get the answer for them. You are extremely sloppy and careless about punctuation. You're putting as many dots as you want whenever you want. You're ignoring comas where they need to be put. You're inserting spaces before punctuation. Summarizing, you're making everything to make your writing very difficult to apprehend.

If you're have difficulties typing on keyboard, you might prefer first to practice a little hitting the keys. Otherwise, if it is just the way you are, this devil-may-care attitude to others is absolutely inappropriate. So, next time please care about the way you communicate via writing.

1. Let's say that "a" > "b" if number of position of "a" is greater than position of "b". As I was able to decipher from what you have written, the conditions are:

1) c>b;
2) b=d+1 or b=d-1 if and only if b=c+1 or b=c-1.

Is that correct? Then b must be less than d. Therefore, we have next possible outcomes depending on position of "c":

"c***" - 0 possible outcomes since "b" must be before "c";
"*c**" - 0 possible outcomes since it must be "bc**" but "d" must be next to "b";
"**c*" - 2 possible outcomes: "dbca" and "bacd";
"***c" - 2 possible outcomes: "adbc" and "badc".

Total 4 possible outcomes.

[lime]

2. All you need is to figure out which of the letters cannot be on the top shelf.

"B" cannot be on the top shelf because it is always below shelf containing "G".
"C" cannot be on the top shelf because it is only letter on the shelf and the second shelf from the top contains also only one shelf which contradicts given conditions.

Examples with all other letters on the top shelf are quite easy to come up with.

"A, D, E, F, G, H".

[ahmad209]

thanks lime for replying