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Calculate the number 3189

NUMBERMANIA: Calculate the number 3189 using numbers [3, 4, 9, 6, 52, 913] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 30

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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Nine lives

A tom cat and a tabby cat were courting on a back fence at night.

The tom leaned over to the tabby with pent up passion and purred... "I'll die for you"

The tabby gazed at him from under lowered eye lids and asked,

"How many times?".

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Channel tunnel proposed

In 1855, a proposal for a tunnel under the English Channel was reported in the New York Daily Times, which, according to French engineer M. Loèpold Favre, would in five years connect Boulogne to Dover. The 18½ mile (30-km) tunnel under the Channel would also need about 1½ mile (2-km) under the shores for each approach at the ends. Excavated at no less than 82-ft (25-m) below the sea bed, the tunnel would be lined with a double arch: one of granite and impermeable cement and an inner arch of thin, iron plates with perforations to reveal even slight leakage. Instead of smoke-producing locomotives, an atmospheric railway using a compressed air tube would carry passengers and freight such as coal. Ventilation shafts would rise above the highest water level in islands formed by excavated rock.«

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