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Find number abc

If 276a3 + c07ab = 6bca1 find number abc. Multiple solutions may exist.

Correct answers: 22

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

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Great at making Sunday lunches

I told my friend that he'd be great at making Sunday lunches.

Because he's an excellent roaster.

Author: UnstoppablePhoenix /@MasterPhoenix

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Spirit level

In 1666, Robert Hooke invented the spirit level, according to Sir David Brewster in the 1832 Edinburgh Encyclopedia. It was likely a variation on the spirit level, or “artificial horizon,” which he may have used while employed as City Surveyor of London after the Great Fire. The original concept was due to Melchisédech Thévenot, sometime before 2 Feb 1661, the date of his letter about it to Christiaan Huygens. In the 1670s, Hooke added a spirit level to his quadrant.«

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