book Maths Puzzle Numerical Ability

What are two consecutive odd integers whose sum is 56?

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book Other Question

Find the LCD of the given rational expressions and convert each expression to an equivalent rational expression with LCD as the denominator.

7a over 24x^5 y^2 , 5b over 16x^2 y^ Molly is 4 years younger then Heidi. In 3 years, Heidi will be twice as old as Molly. How old are they now?