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Find number abc

If c71bc + 2b844 = b4aa7 find number abc. Multiple solutions may exist.

Correct answers: 20

The first user who solved this task is Nasrin 24 T.

#brainteasers #math

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Paper shredder...

The new employee stood before the paper shredder looking confused.

"Need some help?" a secretary asked.

"Yes," he replied. "How does this thing work?"

"Simple," she said, taking the fat report from his hand and feeding it into the shredder.

"Thanks, but where do the copies come out?"

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Niagara rail bridge

In 1883, the international cantilever railway bridge at Niagara Falls was opened with a ceremony before a gathered crowd estimated at more than 10,000 persons. Atop each of two steel towers, two cantilever arms were built, one reaching the shore while the other reached over the gorge, then an ordinary truss bridged the gap between the cantilevers. The bridge span was 495-ft, carrying a double track railway 240-ft above the Niagara River, with weight capacity for two trains. Construction took from 15 Apr 1883 to 1 Dec 1883. This Michigan Central Railway Bridge remained in operation for more than 40 years until replaced by the present stronger steel arch bridge to carry heavier modern trains.«

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