Question

Which of the following forms a Pythagorean triplet?

• A. 5, 12, 14
• B. 8, 15, 16
• C. 20, 21, 29
• D. 3, 4, 6

Answer 1

The correct option is C

20, 21, 29

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

Here,

${20}^2$ + ${21}^2$ = ${29}^2$

i.e. 400 + 441 = 841

The sum of squares of the two smaller numbers equals the square of the third number and thus they form a Pythagorean triplet.