If F={2,4,8,16}, which description is correct?
Answer and explanation
Correct answer: Powers of 2 less than 20
Each member of F can be expressed as a power of 2: 2=2¹, 4=2², 8=2³, and 16=2⁴. Every one of these values is less than 20, and these are exactly the powers of 2 below 20 when positive integral exponents are intended. They are not all prime, they are not the factors of 20, and none is odd. Thus option A is correct.
Frequently asked questions
What is the correct answer to this question?
Powers of 2 less than 20
Why is this the correct answer?
Each member of F can be expressed as a power of 2: 2=2¹, 4=2², 8=2³, and 16=2⁴. Every one of these values is less than 20, and these are exactly the powers of 2 below 20 when positive integral exponents are intended. They are not all prime, they are not the factors of 20, and none is odd. Thus option A is correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: General chapter practice.
