Plz Help 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 Maurya

B. Chandra Gupta I

C. Samudra Gupta

D. Chandra Gupta II

Which game was invented in India?

A. solitaire

B. mahjongg

C. chess

D. checkers

Respuesta :

Question 1: They developed a decimal system with a numeral for zero.

An important development in mathematics during this period was the decimal system notation. The powers of ten with null coefficients were used in order to indicate "zero."

Question 2: Chandragupta II

Chandragupta II was one of the most powerful emperor of the Gupta Empire. Under his rule (c. 380-c. 415) the Gupta Empire reached its greatest size. He was a great supporter of the arts and his rule is often referred to as the “Golden Age” of India.

Question 3: Chess

Chess is believed to have originated in India during the Gupta Empire in the 6th century. Afterwards, it spread through the Silk Road.