Question

please answer these questions till 15 .

the pic is blurred then you may go to the site www.rotarypublicschool.org

Answer 1

this is 15th which i have done

Answer 2

6.)
$7 \ \div \sqrt{5} ={ 7 \times - \sqrt{5} } \div \sqrt{5} \times - \sqrt{5} = 7 \sqrt{5} \div \sqrt{ - 5 ^{2} } = 7 \sqrt{5} \div 5$