BRAIN TEASERS

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Find number abc

If 925ab - 117bc = a0ac9 find number abc. Multiple solutions may exist.

Correct answers: 2

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Making God Laugh

You know how to you make God laugh?
- Tell him your plans.

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Air brake

In 1902, An “Automatic Air Brake” patent was issued to black American inventor Granville T. Woods (U.S. No. 701,981), which was an important safety device for the railroads.

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