Yes. They are real.
There are 15 books in the series.
The Diary of a Wimpy Kid books appeal to readers that like humor but not a lot of reading. Many of the pages have illustrations. The author found a style that sold a lot of books and he is sticking to it.
There is no set number of pages for motivational books. For example How Successful People Think has 160 pages. The Power of Positive Thinking has 218 pages. The Seven Habits of Highly Effective People has 432 pages.
There will be 8 books.
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30 ways.
it depends on the shelf of course
There are seven books on the floor. Let x be the number of books on the floor. The number of books on the shelf is 2 + 3x. From the information given, 3x + 2 = number of books on the shelf. Substitute x=7 into 3x + 2 to find the answer. So, there are 23 books on the shelf.
The answer to this one is 24. You can do this mathematically by 4*3*2*1.
120. You do 5*4*3*2*1=120. you multiply the number that you are given for example how many times can books 3 be arranged on a shelf you multiply 3*2*1=6 that is your answer
5 books can be lined up on a shelf in (5 x 4 x 3 x 2 x 1) = 120 different sequences.
Yes. They are real.
Choose 3 then 2 then 1; 3*2*1 = 6 ways.
Consider one placement at a time. The first book on the shelf could be any of seven. The second could be any of the remaining six. This continues with the rest. The total combinations are: 7! = 7*6*5*4*3*2*1 = 5040
There are only 5 places on the shelf. You have 7 books to choose from. We will ignore the order of the books on the shelf. The first place can be filled from a choice of 7 books, the next place from 6, the next place from 5, the next from 4, and the last of the 5 places from 3 books. So the number of ways of choosing the 5 is found from 7 * 6 * 5 * 4 * 3 = 2520
Ill skip the factorials and just give you what the calculator does in the end. 8*7*6*5*4*3= 20,160