Ncert class 10 maths chapter 4 exercise 4.4 solutions July 8, 2019 16 32 64 128 Ncert solutions for class 10 maths chapter 4 exercise 4.4 in hindi Matematika 4 xndir 461 Մաթեմատիկա 4 4 класс 13 сабак 4 dasarani matematika xndirneri lucum