exam Maths Puzzle Numerical Ability

Please if you would
simplify by rationalizing the denominator
(sqrt11-sqrt5)/(sqrt11+sqrt5)

thank you

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exam Other Question
The reciprocal of a number plus the reciprocal of three times the number equals 1/3. Find the number. Write The percent as a fraction in simplest form.



4. 17%

Any help with this equation would be Greatly</b> appreciated.