Question

Which of the following is not a Pythagorean 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

For any three natural numbers to form a Pythagorean triplet, the sum of the squares of the two smaller numbers should be equal to the square of the third number.

Here, $3^2+4^2=5^2.7^2+{24}^2={25}^2{5}^2+{12}^2={13}^2{8}^2+{20}^2\ne {25}^2$

$\therefore$ 8, 20, 25 do not form a Pythagorean triplet.