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Suresh Khartode

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MATH PUZZLE: Can you replace the question mark with a number?
What is the missing number?

Sir William Fairbairn

Died 18 Aug 1874 at age 85 (born 19 Feb 1789).(1st Baronet) Scottish civil engineer who was first to use wrought iron for ships, bridges, mill shafts, and structural beams. After moving to London in 1811, he invented a steam excavator and a sausage-making machine, but without commercial success. By 1817, he had established an engineering works in Manchester making mill machinery, which later made over 400 locomotives. The shipbuilding works he opened at Millwall, London (1835-49) built hundreds of iron boats. He furnished the rectangular wrought-iron tubes used by Stephenson for the Britannia railway bridge (1850) over the Menai Strait, which included two almost 460-ft (140-m) spans. He assisted James Joule and Lord Kelvin in geological investigations from 1851.«

A child comes home from his fi...

A child comes home from his first day at school.
His mother asks, "Well, what did you learn today?"
The kid replies, "Not enough. They want me to come back tomorrow."
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