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Find number abc

If a4bc4 + a6993 = 3ab6c find number abc. Multiple solutions may exist.

Correct answers: 46

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

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Insulate your percussion instrument

How do you insulate your percussion instruments?
With xylofoam.

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Imitation pearls

In 1656, modern-day imitation pearls were first manufactured by the Frenchman Jacquin, a rosary-bead maker. He coated the inside surface of a hollow glass bead with a mixture made of fish scales, made centuries ago by groups as diverse as ancient Egyptians and native Americans. Natural pearls have been considered extremely valuable for millennia.

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