How many of the first 1000 positive integers are multiples of both 4 and 5 but not 6 ? although the options are a) 34 b) 42 c) 50 and d) 58

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.