Plz i didn't understand these how did advancements during the gupta period transform mathematics? a. they invented algebra. b. they created the concepts of square numbers and square roots. c. they developed a decimal system with a numeral for zero. d. they made progress in metallurgy. under whose reign did the gupta empire reach its greatest size? a. chandragupta mauryab. chandra gupta ic. samudra guptad. chandra gupta iiwhich game was invented in india? a. solitaireb. mahjonggc. chessd. checkers