Please Welcome Myth Greece
Enjoying mountain living, 12 major Greek gods called this place home; at nearly 9,600' up there, the gods did have a nice view
Olympus
Book 13 of his "Elements" deals with regular solids
Euclid
A friendly hint, or 20% for good service
Tip
A 2007 stamp from Papua New Guinea misspelled this word, the inability to read (there was only one "L")
Illiteracy
This age came in with Britain's new queen in 1837
Victorian
Heracles got in on an expedition with the Argonauts, led by this man
Jason
A problem at the 2017 Intl. Math Olympiad for teens involved one of these lines touching a circle at a single point
Tangent line
Advice on where to go; you might get it from the same type of high school counselor
Guidance
A stamp had this big landmark; not the original in N.Y. Harbor, but the lady in front of Vegas' New York-New York casino
The Statue of Liberty
The golden age of this buccaneering activity began around 1650
Piracy
In addition to being god of the sea, he's also the god of earthquakes
Poseidon
It's (13 + 14) x 15
405
Leave this 10-letter advice in the box; maybe we'll take it
Suggestion
On one stamp, Monaco "oops"ed by putting 5 fingers & a thumb, too, on this New Deal U.S. president
Franklin D. Roosevelt
Wet cultivation of this crop marks the start of Japan's Yayoi Period
Rice
Thought to be the center of the Earth, this town at Mt. Parnassus' foot was known for its oracle--ya see that coming?
Delphi
DAILY DOUBLE: In 1952 an early computer was used to discover the 13th Mersenne one of these numbers
A prime number
Beginning & ending with "M", it's a wise saying or rule of conduct
A maxim
A 1932 Philippine stamp honored Pagsanjan Falls but showed Vernal Falls in this California national park
Yosemite
In history's stages per Karl Marx, feudalism gave way to this -ism, AKA the free market
Capitalism
Homer dubbed this war god "the blood-stained bane of mortals", & ol' Homie wasn't far wrong
Ares
In 1640 16-year-old Blaise Pascal came to math fame with an essay on these "sections"
Conic sections
I'm going to give you my this, also an access point on a computer or the info that goes through it
Input
A 1968 Chinese stamp, "The Whole Country is Red", did not red out thisisland, & the authorities soon recalled it
Taiwan
DAILY DOUBLE: For warships, the iron age began at the same time as the age of this type of power
Steam