Important Questions for Class 8 Maths Chapter 2 Power Play

Exponents and powers can be challenging for Class 8 students when they learn concepts like exponential form, laws of exponents, and negative exponents. Practising different types of questions helps students understand these concepts clearly and build confidence in solving problems.

The Important Questions for Class 8 Maths Chapter 2 include a practice set based on the Power Play chapter from the NCERT Ganita Prakash Maths textbook. These questions cover exponents, powers, and standard form, with MCQs, an answer key, and step-by-step solutions to help students revise important concepts.

What Does the Power Play Chapter Cover?

The Power Play chapter in Ganita Prakash focuses on exponential form, laws of exponents including negative exponents, simplification of expressions using powers, and converting numbers into standard form. These concepts help students understand the use of powers in mathematical expressions and strengthen their foundation in exponents.

Important Questions for Class 8 Maths Chapter 2 PDF

Students can access the PDF of Important Questions for Class 8 Maths Chapter 2 to practise and revise key concepts from the Power Play chapter. The downloadable file includes the question paper for quick reference and exam preparation.

Important Questions for Class 8 Maths Chapter 2: Power Play 

The Power Play chapter focuses on important concepts related to exponents and powers, including exponential form, laws of exponents, negative exponents, and standard form. The following practice set covers key concepts from the chapter to help students strengthen their understanding and revise effectively.

Q1. Express 125/512 in exponential form.

(A) (5/8)²    

(B) (5/8)³    

(C) (25/8)³    

(D) (5/7)³

Answer: (B) (5/8)³

Q2. Find the value of (5²)³.

(A) 5⁵    

(B) 5⁶  

 (C) 5³   

 (D) 5⁴

Answer: (B) 5⁶

Q3. (xᵃ/xᵇ)ᶜ × (xᵇ/xᶜ)ᵃ × (xᶜ/xᵃ)ᵇ equals

(A) x    

(B) x^(a+b+c)    

(C) 0    

(D) 1

Answer: (D) 1

Q4. Evaluate {(1/3)⁻³ − (1/2)⁻³} ÷ (1/4)⁻³.

(A) 18/64   

 (B) 17/64    

(C) 16/64   

 (D) 19/64

Answer: (D) 19/64

Q5. Express 0.000000565 in standard form.

(A) 5.65 × 10⁻⁷   

 (B) 56.5 × 10⁻⁷   

 (C) 5.65 × 10⁷  

 D) 0.56 × 10⁷

Answer: (A) 5.65 × 10⁻⁷

Q6. Solve: [64]^(−1/2) − [−32]^(−4/5) = ?

(A) 1/8    

(B) 3/8    

(C) 1/16   

(D) 3/16

Answer: (C) 1/16

Q7. The value of (3⁻¹ + 4⁻¹)⁻¹ ÷ 5⁻¹ is

(A) 7/10    

(B) 60/7    

(C) 7/5    

(D) 7/15

Answer: (B) 60/7

Q8. Write the following number in standard form: 3500000

(A) 3.5 × 10⁶    

(B) 3.5 × 100⁶   

 (C) 35 × 10⁶    

(D) 0.35 × 10⁶

Answer: (A) 3.5 × 10⁶

Q9. The value of (2/5)⁻³ is

(A) 8/125    

(B) 25/4    

(C) 125/8    

(D) −2/5

Answer: (C) 125/8

Q10. Evaluate: [{(−1/3)²}⁻²]⁻¹

(A) 1/81    

(B) 2/81    

(C) 3/81    

(D) 4/81

Answer: (A) 1/81

Q11. Write 2.34 × 10⁵ in standard form:

(A) 0.000234    

(B) 234000    

(C) 0.00234    

(D) 2340

Answer: (B) 234000

Q12. If 2ˣ = 8 and 3ʸ = 81, then what is the value of x + y?

(A) 6    

(B) 7   

(C) 8    

(D) 9

Answer: (B) 7

Q13. The value of (1/2)⁻² + (1/3)⁻² + (1/4)⁻² is:

(A) 29/144    

(B) 29   

(C) 9    

(D) 16

Answer: (B) 29

Q14. Find the value of (2⁻³ + 2⁻²) × 2⁵

(A) 14    

(B) 12    

(C) 15   

(D) 13

Answer: (B) 12

Q15. If aᵐ × aⁿ = a¹⁰ and aᵐ/aⁿ = a², find the values of m and n.

(A) m = 6, n = 4   

(B) m = 5, n = 5    

(C) m = 7, n = 3    

D) m = 8, n = 2

Answer: (A) m = 6, n = 4

Why Practising These Important Questions Helps

Practising the Power Play Class 8 Ganita Prakash MIQ set helps students improve their understanding of exponents and powers. It allows them to apply exponent rules correctly, identify calculation errors, and develop confidence in solving objective-type questions. 

Reviewing answers and solutions also helps students analyse their mistakes and improve their problem-solving approach. Key benefits of practising these questions include:

• Strengthening concepts related to exponents, powers, and standard form.

• Improving accuracy while solving expressions involving negative exponents.

• Understanding the application of different laws of exponents.

• Building speed and confidence for multiple-choice questions.

• Revising important concepts before Class 8 Maths examinations.