Find all pairs of consecutive odd natural number, both of which are larger than 10, such that their sum is less than 40.

Find all pairs of consecutive even positive integers, both of which are larger than 8, such that their sum is less than 25.

Find all pairs of consecutive even positive integers, both of which are larger than 5, such that their sum is less than 23.

Find all pairs of consecutive even positive integers, both of which are greater than 10 such that their sum is less than 50.

Find all pairs of consecutive odd positive integers, both of which are smaller than 18, such that their sum is more than 20.

Find all pairs of consecutive add positive integers both of which are smaller than 10 such that their sum is more than 11,

Find all pairs of consecutive odd integers both of which are smaller than 12 and their sum is more than 11.

Find all pairs of consecutive even integers both of which are greater than 7 and their sum is less than 25.

Find all pairs of consecutive even integers both of which are greater than 6 and their sum is less than 27.

Find two consecutive odd natural numbers whose product is 323.

Find all pairs of consecutive even numbers which are greater than 8 and their sum is smaller then 27.