You're sharpest in your 20's; around 30, memory begins to decline, particularly your ability to perform mathematical computations.

20多岁的时候你的思维最敏捷；30岁左右，记忆力开始衰退，尤其是你的数学计算能力。

" We believe that Aryabhata was the first to assign zero as a digit, a revolutionary concept, which simplified mathematical computations and helped evolve more complex avenues such as algebra and calculus, " said Anuradha Mitra, a Kolkata-based professor of mathematics.

“我们相信阿耶·巴塔是第一个将零作为数字赋值的人，这是一个革命性的概念，简化了数学计算，有助于发展更复杂的领域，比如代数和微积分，”加尔各答的数学教授阿努拉达·米特拉说道。