Question

Which of the following is not a pythogorean triplet?

• A. (3,4,5)
• B. (7,24,25)
• C. (5,12,13)
• D. (8,20,25)

Answer 1

The correct option is D (8,20,25)

$3^2+4^2=5^2,7^2+{24}^2={25}^2,5^2+{12}^2={13}^2,8^2+{20}^2\ne {25}^2$
Pythagorean triplets can form the three sides of a right angled triangle.