BRAIN TEASERS

# Find number abc

If aa455 - bacb5 = b9c40 find number abc. Multiple solutions may exist.
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math

### A man was sitting alone in his...

A man was sitting alone in his office one night when a genie popped up out of his ashtray.
"And what will your third wish be?"
The man looked at the genie and said, "Huh? How can I be getting a third wish when I haven't had a first or second wish yet?"
"You have had two wishes already," the genie said, "but your second wish was for me to put everything back the way it was before you
made your first wish. Thus, you remember nothing, because everything is the way it was before you made any wishes. You now have one wish left."
"Okay," said the man, "I don't believe this, but what the heck. I've always wanted to understand women. I'd love to know what's going on inside their heads."
"Funny," said the genie as it granted his wish and disappeared forever, "That was your first wish, too!"
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### Arthur Holmes

Died 20 Sep 1965 at age 75 (born 14 Jan 1890).English geologist and petrologist was one of the foremost geologists of the twentieth century, who made major contributions to the geochronology of Africa, the genesis of igneous rocks, and physical geology. He developed a method of determining the age of the earth based on measurement of uranium decay in igneous rocks (which invalidated William Thomson Kelvin's hypothesis that the earth's age can be established on the basis of the planet's cooling from a initial molten state). Holmes' method proved to be remarkably accurate and laid the foundation of isotope geology. This was the first quantitative time scale for geology based on measuring the radioactive constituents of rocks.
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