Math prodigy George Bidder was born to a Devonshire stonemason in 1806. In a public appearance at age 11, he answered each of these questions in less than a minute:

- What is the cube root of 673,373,097,125? “Answer, 8,765.”
- If a mouse can draw one ounce and a half, how many mice can draw 50,000 tons? “Answer, 1,194,666,666, and one ounce over.”
- If a coach travels from Exeter to Plymouth, 44 miles, every day in a year, how often does a wheel turn round that is 2 feet 9 inches? “Answer, 30,835,200.”
- If a fan of a windmill goes round 15 times in a minute, how many times will it go round in 7 years, 4 months, 1 week, 2 hours, 3 minutes — 365 days 6 hours to the year, and 28 days to the month? “Answer, 57,897,245.”
- If the ministers have taken of the income tax 12 millions of money in 1-pound notes, how many miles would they cover a road 30 feet wide, each note being 8 inches by 4 and a half? “He directly answered, 18 miles, 1,653 yards, and one foot.”
- Suppose the earth to consist of 971 million of inhabitants, and suppose they die in 33 years and four months, how many have returned to dust since the time of Adam, computing it to be 5,850 years? “Answer, 170,410,500,000.” Multiply it again by 99. “Answer, 16,870,639,500,000.”

(Reported in *Kirby’s Wonderful and Scientific Museum*, 1820)