Conversation so far:
Where did George Washington attend school?
George Washington did not have the formal education that his elder brothers received at Appleby Grammar School in England
Did George Washington have any formal education?
George Washington did not have the formal education but he did learn mathematics, trigonometry, and land surveying, and he was talented in draftsmanship and map-making.
Where was George Washington born?
George Washington was born at Popes Creek in Westmoreland County, Virginia,
Who were George Washington's parents?
George Washington's parents were Augustine and Mary Ball Washington.
Did George Washington have any siblings?
George Washington was the first of six children.

Question: How many brothers did he have?
Self-contained rewrite: How many brothers did George Washington have?