यदि \(A={x\in \mathbb{N}:x\) (5) से विभाज्य है और \(x\leq 100}\) है, तो (n(A)) कितना है?

If \(A={x\in \mathbb{N}:x\) is divisible by (5) and \(x\leq 100}\), what is (n(A))?

Explanation opens after your attempt
Correct Answer

A. (20)

Step 1

Concept

The multiples of (5) from (5) to (100) are \(5,10,\ldots,100\).

Step 2

Why this answer is correct

Their count is \(100\div5=20\).

Step 3

Exam Tip

If the upper bound is a multiple, include it in the count. चरण 1: (5) से (100) तक (5) के गुणज \(5,10,\ldots,100\) हैं। चरण 2: इनकी संख्या \(100\div5=20\) है। चरण 3: यदि ऊपरी सीमा गुणज है तो उसे गिनती में शामिल करें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A={x\in \mathbb{N}:x\) (5) से विभाज्य है और \(x\leq 100}\) है, तो (n(A)) कितना है? / If \(A={x\in \mathbb{N}:x\) is divisible by (5) and \(x\leq 100}\), what is (n(A))?

Correct Answer: A. (20). Explanation: चरण 1: (5) से (100) तक (5) के गुणज \(5,10,\ldots,100\) हैं। चरण 2: इनकी संख्या \(100\div5=20\) है। चरण 3: यदि ऊपरी सीमा गुणज है तो उसे गिनती में शामिल करें। / Step 1: The multiples of (5) from (5) to (100) are \(5,10,\ldots,100\). Step 2: Their count is \(100\div5=20\). Step 3: If the upper bound is a multiple, include it in the count.

Which concept should I revise for this Mathematics MCQ?

The multiples of (5) from (5) to (100) are \(5,10,\ldots,100\).

What exam hint can help solve this Mathematics question?

If the upper bound is a multiple, include it in the count. चरण 1: (5) से (100) तक (5) के गुणज \(5,10,\ldots,100\) हैं। चरण 2: इनकी संख्या \(100\div5=20\) है। चरण 3: यदि ऊपरी सीमा गुणज है तो उसे गिनती में शामिल करें।