\(यदि (Y={x:x\in \mathbb{N},,x\) is prime and x+2 is also prime\(,,x<20}), तो (Y) क्या है\)?

\(If (Y={x:x\in \mathbb{N},,x\) is prime and x+2 is also prime\(,,x<20}), what is (Y)\)?

Explanation opens after your attempt
Correct Answer

A. \(Y=\{3,5,11,17\}\)

Step 1

Concept

Primes less than (20) are (2,3,5,7,11,13,17,19).

Step 2

Why this answer is correct

Values for which (x+2) is also prime are (3,5,11,17).

Step 3

Exam Tip

Check the second condition separately for every candidate. चरण 1: (20) से छोटे अभाज्य (2,3,5,7,11,13,17,19) हैं। चरण 2: जिनके साथ (x+2) भी अभाज्य है, वे (3,5,11,17) हैं। चरण 3: प्रत्येक मान पर दूसरी शर्त अलग से जांचें।

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Mathematics Answer, Explanation and Revision Hints

\(यदि (Y={x:x\in \mathbb{N},,x\) is prime and x+2 is also prime,,x<20}), तो (Y) क्या है? \(/ If (Y={x:x\in \mathbb{N},,x\) is prime and x+2 is also prime\(,,x<20}), what is (Y)\)?

Correct Answer: A. \(Y=\{3,5,11,17\}\). Explanation: चरण 1: (20) से छोटे अभाज्य (2,3,5,7,11,13,17,19) हैं। चरण 2: जिनके साथ (x+2) भी अभाज्य है, वे (3,5,11,17) हैं। चरण 3: प्रत्येक मान पर दूसरी शर्त अलग से जांचें। / Step 1: Primes less than (20) are (2,3,5,7,11,13,17,19). Step 2: Values for which (x+2) is also prime are (3,5,11,17). Step 3: Check the second condition separately for every candidate.

Which concept should I revise for this Mathematics MCQ?

Primes less than (20) are (2,3,5,7,11,13,17,19).

What exam hint can help solve this Mathematics question?

Check the second condition separately for every candidate. चरण 1: (20) से छोटे अभाज्य (2,3,5,7,11,13,17,19) हैं। चरण 2: जिनके साथ (x+2) भी अभाज्य है, वे (3,5,11,17) हैं। चरण 3: प्रत्येक मान पर दूसरी शर्त अलग से जांचें।