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Find all pairs of consecutive odd natura...

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

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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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Knowledge Check

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

    A
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    B
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    C
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    D
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