Find the Missing Number
A sequence of numbers follows a specific pattern: 3, 7, 13, 21, __, 43.
What is the missing number in the sequence?
How many pages are there in the book
Sophia is reading a book. On the first day, she reads 1/5 of the pages plus 12 more. On the second day, she reads 1/4 of the remaining pages plus 15 pages. On the third day, she reads 1/3 of the remaining pages plus 18 pages. After this, she has 1/4 of the book left to read. How many pages are there in the book?
Let's analyze the pattern in the sequence:
ReplyDeleteTo go from 3 to 7, we add 4.
To go from 7 to 13, we add 6.
To go from 13 to 21, we add 8.
The pattern in the sequence is that the difference between consecutive numbers is increasing by 2 each time:
7 - 3 = 4
13 - 7 = 6
21 - 13 = 8
Following this pattern, the next difference should be 8 + 2 = 10.
So, the missing number is:
21 + 10 = 31
Therefore, the missing number in the sequence is 31.