Concept-wise Practice

90 MCQ Questions for Class 10

90 se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

1 questions tagged with 90.

Question 1/1 Medium Mathematics Chapter 1: Real Numbers 3: Prime factorisation Class 10 Level 10

(90) का अभाज्य गुणनखंडन क्या है?

What is the prime factorisation of (90)?

Explanation opens after your attempt
Correct Answer

A. \(2 \times 3^2 \times 5\)

Step 1

Concept

Write \(90=9 \times 10\).

Step 2

Why this answer is correct

\(9=3^2\) and \(10=2 \times 5\), so \(90=2 \times 3^2 \times 5\).

Step 3

Exam Tip

Splitting into easy parts like (9) and (10) is quick. चरण 1: \(90=9 \times 10\) लिखें। चरण 2: \(9=3^2\) और \(10=2 \times 5\), इसलिए \(90=2 \times 3^2 \times 5\)। चरण 3: (9) और (10) जैसे आसान भागों में तोड़ना तेज तरीका है।

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