10 most difficult numbers riddlesNumbers quiz
Which of the following Roman numerals stands for 4?
Both IV and IIII
None of the above
Both notations are correct and historically Roman numerals were often written less consistently than today. The notation 'IIII' is often seen on clock faces. The reason for that may be practical, to avoid confusing the IV and VI when the clock is held upside down (although other theories also exist).
What is the diameter of the Milky Way?
100 000 thousand light years
200 000 thousand light years
500 000 thousand light years
1 000 000 thousand light years
The diameter of our galaxy - the Milky Way is 100,000 light years. The Sun is located about 26,000 light years from its center.
What number is the pattern for the construction of Dante Alighieri's song "Divine Comedy"?
The Divine Comedy is composed of 14,233 lines that are divided into three canticas – Inferno (Hell), Purgatorio (Purgatory), and Paradiso (Paradise) – each consisting of 33 cantos . The number "three" is prominent in the work, represented in part by the number of canticas and their lengths. Additionally, the verse scheme used, terza rima, is hendecasyllabic with the lines composing tercets according to the rhyme scheme aba, bcb, cdc, ded,
Which numeral system was in use in ancient Sumer and Babylon?
Remnants of the highly composite sexagesimal system are in use even today for time measurement and geometry. An hour of time is divided into 60 minutes, which in turn are divided into 60 seconds.
In what period of time does the Sun make a full turn around the center of the Milky Way?
within every 225 million years
within 250 million years
within 300 million years
within 350 million years
The sun performs a full turn around the center of our galaxy during 225 million years.
How many strings does a pedal harp typically have?
The pedal harp is a large and technically modern harp, designed primarily for art music and may be played either solo, as part of a chamber ensemble, or in an orchestra. It typically has a range of six and a half octaves (47 strings). The role of the pedals is to alter the pitch of the strings, so that it can easily play works written in any key.
What number is considered unlucky in Italy?
In Italian culture, the number 17 is considered unlucky. When viewed as the Roman numeral, XVII, it is then changed anagrammatically to VIXI, which in the Latin language translates to "I lived", the perfect implying "My life is over."
Typically, how many leap years are in a century?
The Gregorian Calendar omits 3 leap days every 400 years, omitting February 29 in the 3 century years (integer multiples of 100) that are not also integer multiples of 400. For example, 1600 was a leap year, but 1700, 1800 and 1900 were not. Similarly, 2000 was a leap year, but 2100, 2200, and 2300 will not be.
What is the largest integer ever used in a mathematical proof?
Graham's number is an enormous number that arises as an upper bound on the answer of a problem in the mathematical field of Ramsey theory. The number was published in the 1980 Guinness Book of World Records, adding to its popular interest.
At what temperature does the water have the highest density?
Increasing the temperature generally decreases the density, but water is a notable exception: the density of water increases between its melting point at 0 °C and 4 °C. Similar behavior is observed in silicon at low temperatures.