Explanation

Brahmagupta, an astronomer and mathematician from India used zero in mathematical operations like addition and subtraction.

Aryabhatta introduced zero in 5th century.

Brahmagupta introduced zero in calculations in around 628 AD.

Explanation

A scanner scans images, printed text, handwriting or an object and converts it to a digital image. 

Scanner is an input device. 

Scanner founder: Russell Kirsch

Russell Kirsch belongs to USA.

Explanation

Explanation

Gurdwara Rori Sahib is a gurdwara which is located in Eminabad, Gujranwala, Punjab, Pakistan.

It was built during the reign of Maharaja Ranjeet Singh.

The gurudwara is a sacred site for Sikhs, built to commemorate the visit of Guru Nanak Dev Ji.

Explanation

Blue Lake is located in Mount Gambier, South Australia.

It is famous for its vibrant blue color during the summer months.

Explanation

Franklin D. Roosevelt was elected President of the United States four times: 1933, 1936, 1940, and 1944.

Franklin Delano Roosevelt (January 30, 1882 – April 12, 1945), also known as FDR.

He was the 32nd president of the United States.

He serving from 1933 until his death in 1945.

The longest-serving U.S. president, he is the only president to have served more than two terms.

Explanation

ریل پیل ہونا محاورہ ہے، اس کا مطلب کثرت ہونا ہے۔

Explanation

رنگ تیرے چمن میں، بو تیری خوب دیکھا تو باغباں تو ہے اس شعر میں علم بیان کی تشبیہ صورت آئی ہے۔

Explanation

خفیف ہونا محاورہ ہے، اس کا مفہوم شرمندہ ہونا ہے۔

Explanation

احسان دانش مشہور شاعر نے پنجاب یونیورسٹی میں مزدور کی حیثیت سے کام کیا اور بعد میں اس کے ممتحن مقرر ہوئے۔