GENERAL KNOWLEDGE

Detailed explanation-1: -Benjamin Banneker (1731–1806) was a self-taught mathematician and surveyor. When he was 21, Banneker was shown a pocket watch. He was so fascinated by the watch that its owner lent it to Banneker. He spent time studying pocket watches before deciding to build his own timepiece.

Detailed explanation-2: -Benjamin Banneker, a free African-American man living in a slave state in the eighteenth century, never knew the weight of iron shackles or the crack of an overseer’s whip. A native of Baltimore County, Maryland, his experience diverged from those of most African Americans living in the early United States.

Detailed explanation-3: -*The birth of Benjamin Bradley is celebrated on this date in 1836. He was a Black engineer and inventor. Bradley’s correct surname was Boardley, but since 1859 authors have written about him with Bradley.