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Replace the question mark with a number

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

Correct answers: 129

The first user who solved this task is Thinh Ddh.

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This Wife Is Too Jealous

There was once a wife so jealous that when her husband came home one night and she couldn't find hairs on his jackets she yelled at him, "Great, so now you're cheating on me with a bald woman!"
The next night, when she didn't smell any perfume, she yelled again by saying, "She's not only bald, but she's too cheap to buy any perfume!"

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Rufus Porter

Died 13 Aug 1884 at age 92 (born 1 May 1792). American editor and inventor who put out the first issue of Scientific American on 28 Aug 1845, but sold that business 10 months later to Orson Munn and Alfred Ely Beach. He editted it for one more year. As an inventor, he had little business sense, but held over 100 patents, including a fire alarm, signal telegraph, fog whistle, and a washing machine. He sold his patent for a revolving rifle to Samuel Colt for $100 in 1844. He had an interest in painting portraits, and in 1820 built a camera obscura. From 1820, he became interested in the hot-air balloon. He constructed his first model in 1833. Porter built and exhibited other models. By 1853, he demonstrated a 22-foot model airship which circled in the rotunda of the New York Merchant's Exchange. Ultimately, despite trying, he had no major success in aerial navigation.«

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