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In the Pythagorean triplet (3, 4, ?), the missing third number is:
A{'text': '6'}
B{'text': '7'}
C{'text': '8'}
D{'text': '5'}
Answer & Solution
Correct answer: D. {'text': '5'}
1. A Pythagorean triplet (a, b, c) satisfies a² + b² = c².
2. Here a = 3, b = 4, so c² = 3² + 4² = 9 + 16 = 25.
3. Therefore c = √25 = 5.
4. So the triplet is (3, 4, 5).
5. Hence the missing number is **5**.
_Source: Selina Concise ICSE Class 8 Mathematics Ch 3 "Squares and Square Roots", Pythagorean triplets_
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