Calculate the number 1504
[6778] Calculate the number 1504 - NUMBERMANIA: Calculate the number 1504 using numbers [7, 4, 8, 8, 15, 309] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 10 - The first user who solved this task is Nasrin 24 T
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Calculate the number 1504

NUMBERMANIA: Calculate the number 1504 using numbers [7, 4, 8, 8, 15, 309] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #numbermania
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April Fool's Day - Here are 5 pranks you can play on people

1. Conference call two people then don’t say anything, just listen.
2. Place a ‘house for sale’ ad in the newspaper for someone’s home.
3. Paint the tips of someone’s pen and pencil with clear nail polish so none of them work.
4. Hide a small radio in the ceiling tiles above someone’s desk and turn it on very softly.
5. Fill someone’s hair-dryer with baby powder.
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First glass plate photo

In 1839, John Herschel made the first (remaining) photograph on glass plate. The image he captured was of the 40-foot, 48" aperture telescope used by his father William Herschel, in Slough, England. It had sat decades without use, and was dismantled a short time later. Twenty years earlier, in 1819, Herschel published the results of his experiments with silver and salts. A chance comment about Daguerre's experiments in a letter to his wife on 22 Jan 1839 from a friend prompted John into new activity, and within a few days, he had prepared some photographs. In papers he published in 1840-42, he coined the new words "emulsion", "positive" and "negative" and reinforced Stenger's earlier introduction of the word "photography."«
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