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Darya Filimonova

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last 3 solved tasks
If 8aa38 - 60c80 = ca1b8 find number abc. Multiple solutions may exist.
The aim is to place the some numbers from the list (5, 7, 13, 30, 32, 38, 55, 57, 63, 85, 89) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B+C.

Pneumatic tyre

In 1889, John Boyd Dunlop, a Scottish inventor, was issued a patent for his pnematic tyre. In 1887, when his 9-yr-old son complained of the rough ride he experienced on his tricycle over the cobbled streets of Belfast. Dunlop devised and fitted rubber air tubes held on to a wooden ring by tacking a linen covering fixed around the wheels. Due to the major improvement in riding comfort, Dunlop continued development, until he patented the idea. *[p.223] [Image: John Boyd Dunlop]

Naked Man

Q: What did the elephant say to the naked man?

A: "How do you drink water with that?"

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