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TRE (treh)

Three in Italian
Common clues:
Due follower; Uno + due; It's past due; Three, in Napoli; Half of sei; Amount past due?; Three in Turin; Cremona crowd?; Roman numeral?
Related crosswordese: TRES; TREY
Crossword puzzle frequency: 6 times a year
Frequency in English language: 55677 / 86800
Stephen Curry Drains His 400th Three-Pointer of the Season

In Vietnam, there is a superstition that considers it bad luck to take a photo with three people in it; it is professed that the person in the middle will die soon.

Three is often the largest number written with as many lines as the number represents. The Romans tired of writing 4 as IIII, instead using IV, but to this day 3 is written as three lines in Roman and Chinese numerals. This was the way the Brahmin Indians wrote it, and the Gupta made the three lines more curved. The Nagari started rotating the lines clockwise and ending each line with a slight downward stroke on the right. Eventually they made these strokes connect with the lines below, and evolved it to a character that looks very much like a modern 3 with an extra stroke at the bottom. It was the Western Ghubar Arabs who finally eliminated the extra stroke and created our modern 3.

The Shield of the Trinity is a diagram of the Christian doctrine of the Trinity

  • Three is the first unique prime due to the properties of its reciprocal.

  • Three non-collinear points determine a plane and a circle.

  • A natural number is divisible by three if the sum of its digits in base 10 is divisible by 3. For example, the number 21 is divisible by three (3 times 7) and the sum of its digits is 2 + 1 = 3. Because of this, the reverse of any number that is divisible by three (or indeed, any permutation of its digits) is also divisible by three. For instance, 1368 and its reverse 8631 are both divisible by three (and so are 1386, 3168, 3186, 3618, etc..).

  • A triangle is the only figure which, if all endpoints have hinges, will never change its shape unless the sides themselves are bent.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Three".