Class 10th ncert exercise 8.4 question number 5 July 8, 2019 16 32 64 128 Exercise 8.4 question number 5 for class 10th Lesson 10 homework 5.4 Lesson 10 homework 5.5 Class 10 ex 8.4 q5 iii Grade 5 module 4 lesson 10 problem set