Class 9 Math Review Exercise 2 Question 1 (All MCQs Solved) | Unit 2 | PCTB New Book 2025

Assalam-o-Alaikum, dear students! Welcome to Dr. M. Yousaf's official lecture for 9th Class Mathematics, fully aligned with the Punjab Curriculum & Textbook Board (PCTB) New Syllabus 2025. In this video lecture, we completely solve Question 1 of Review Exercise 2 from Unit 2 (Logarithms). We cover all 10 multiple-choice questions (MCQs) step-by-step, including standard form and scientific notation conversions, common logarithm bases, logarithmic laws, evaluation of log expressions, and conversion between exponential and logarithmic forms. PROBLEMS SOLVED (MCQS PARTS i to x): (i) Standard form of 5.2 × 10^6 (ii) Scientific notation of 0.00034 (iii) Base of common logarithm (iv) Value of log₂ 2³ (v) Value of log 100 (vi) If log 2 = 0.3010, finding log 200 (vii) Value of log(0) (viii) Value of log 10,000 (ix) Simplification of log 5 + log 3 (x) Converting 3^4 = 81 into logarithmic form TIMELINE / CHAPTER TIMESTAMPS: 00:00 - Introduction to Unit 2 Review Exercise 2 MCQs 00:17 - MCQ (i): Standard Form Conversion 02:08 - MCQ (ii): Scientific Notation Conversion 03:18 - MCQ (iii): Common Logarithm Base? 03:34 - MCQ (iv): Value of log₂ 2³ 04:27- MCQ (v): Value of log 100 05:56 - MCQ (vi): If log 2 = 0.3010, finding log 200 07:25 - MCQ (vii): Value of log (0) 08:12 - MCQ (viii): Value of log 10,000 09:21 - MCQ (ix): Simplification of log 5 + log 3 10:16 - MCQ (x): Converting 3^4 = 81 into logarithmic form Don't forget to Like, Share, and Subscribe to @Dryousaf001 for more board-aligned math lectures! #9thMath #ReviewExercise2 #LogarithmsMCQs #PCTB2025 #PunjabBoard #DrMYousaf