No because 11/42 is a rational number
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The square root of 42 is an irrational number
Yes, it is.
56 over 42 (56/42) in lowest terms is 4/3 or 11/3
Using the Pythagorean Theorem, a2 +b2=c2 where c is the hypotenuse. So if we say that the legs are equal to 4 cm and 5 cm respectively we can rewrite the equation 42+52=c2 -> 16+25=41=c2 so then, c= the square root of 41, which is an irrational number.
The number is 55. 55 - 13 = 42.