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

Explanation

Let x be the smaller of the two consecutive odd natural numbers.Then the other odd integer is `x+2.`

It is given that both the natural are greater than `10` and their sum is less than` 40.`


Therefore,

` x>10 { and, } x+x+2<40 `

`Rightarrow x > 10 and 2 x < 38`

`Rightarrow x > 10 and x < 19 `

`Rightarrow 10 < x < 19 >`

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