Interesting Things About 1-10 Trivia Quiz

Answer: True

According to Benford's Law, in any real-life set of numbers, most will start with the digit "1". This law is based on probability. All other things being equal, in a set of numbers, the numbers 1-9 should each have a 11.1% chance of occurring as the first digit. In actuality, the number "1" occurs as the first digit significantly more often, about 30% of the time. In any data list, the digit "1" should begin about a third of the numbers in the set. In fact, it has been shown that Benford's Law applies to everyday things such as utility bills, house addresses and prices, birth and death rates, and geographical information such as the length of rivers.

If there are significantly fewer than 30% of the numbers in a set of scientific or financial data beginning with a "1", fraudulent activity can be suspected.

Answer: It is the only number that is considered both even and odd

The number two is an even number. It is not considered an odd number. A prime number is one that is divisible by only itself and the number one. Being divisible only by itself and the number one, the number two is a prime number. The number one is not a prime number, so two is the first prime number when counting up from zero.

It is also the only even prime number. The list of prime numbers starts with two, then continues 3, 5, 7, 11, 13, 17, 19, .... Any even number above the number two will always be divisible by at least itself, one, and two, which means that there are no other even prime numbers.

The number two also has only two factors (2 and 1).

Answer: Three

When whole numbers are multiplied by three, the sum of the product's digits will always be divisible by three. For example, 12 x 3 = 36; 3 + 6 = 9. The resulting value (9) is divisible by three.

This rule stands with all multiples of three. For example, 1587 × 3 = 4761; 4 + 7 + 6 + 1 = 18. The value "18" is evenly divisible by three.

Answer: Geography

In 1853, South African mathematician Francis Guthrie theorized that no more than four colors are required to colour the regions of any map so that no two adjacent regions have the same colour. For example, using only four colours, all states in the US can be coloured to show each one separately, with each state having a distinct colour from all of its neighbours.

In 1976, computer programmers Kenneth Appel and Wolfgang Haken showed that Guthrie's theory is correct.

Answer: 4, 6, 8, 12, 20

A Platonic solid is a three-dimensional regular polyhedron. This means that the 3-D objects have identically sized and shaped faces, that all angles and lines are the same size, and that the same number of faces meet at each vertex. There are five Platonic solids.

These include tetrahedron (4 faces); cube (6 faces); octahedron (8 faces); dodecahedron (12 faces); icosohedron (20 faces). The evenly-shaped sides and angles of Platonic solids allow them to be used as fair dice.

Answer: True

A perfect number is a positive integer equal to the sum of its factors except for the number itself. In the case of the number six, its factors (not including itself) are 1, 2, and 3. When you add those values up (1 + 2 + 3) you end up with six, or the first perfect number.

The next perfect number is 28 (1 + 2 + 4 + 7 + 14 = 28). The next perfect number after that is 496 (1 + 2 + 4 + 8 + 16 + 31 + 62 + 124 + 248 = 496). Numbers smaller than six are not perfect numbers because they are not equal to the sum of their factors.

Answer: It is equal to 2^n-1

Mersenne prime numbers are named after a French monk who proposed them in the early 17th century. These prime numbers are equal to 2^n-1, with n being an integer. The number "7" is a Mersenne prime number because 2^3-1=7. There are over fifty Mersenne prime numbers, most of which have been discovered by a distributed computing project that is known as the Great Internet Mersenne Prime Search.

The number seven was used long before Einstein was born. The diameter of a circle is calculated using a formula that includes the radius. If the radius is not "7", then the number will not be used to calculate a diameter. Finally, number seven is actually the fourth prime number after 2, 3, and 5, not the fifth as mentioned in the question.

Answer: The number "8" is considered very lucky in China

The number eight is considered very lucky in China. The Cantonese word for "eight" is "ba". That sounds very similar to "fa", which means "well-off" or "becoming rich in a short time".

Another interesting thing happens when the number eight is multiplied by values with successive digits and then added to successive digits. Here is a chart that shows how these numbers progress in this fashion:
8 × 1 + 1 = 9
8 × 12 + 2 = 98
8 × 123 + 3 = 987
8 × 1234 + 4 = 9876
8 × 12345 + 5 = 98765
8 × 123456 + 6 = 987654
8 × 1234567 + 7 = 9876543
8 × 12345678 + 8 = 98765432
8 × 123456789 + 9 = 987654321

Answer: 76

Pluto was discovered by Clyde Tombaugh in February, 1930. At that point, it was said to be a planet and astronomers stated that there were nine planets in our solar system.

In August, 2006, the International Astronomical Union (IAU) reviewed all requirements needed to be defined a planet. There are three requirements for celestial bodies to be labelled a planet. These include that the object must orbit around the sun, maintain a nearly round shape, and clear away the area around its orbit. The IAU determined that Pluto has not absorbed space rocks and asteroids like other planets have done. Unlike true planets, there are still a lot of these objects in its path, so it was downgraded to a dwarf planet instead of an actual planet.

Answer: Pythagoras and his followers

The tetractys is an equilateral triangle made of nine equilateral triangles. There are ten points on the tetractys where the triangles touch. From the top down, the points are arranged in four rows, with one, two, three, and four points in each row. The first two lines of the Pythagorean prayer show the importance of the ten points on the tetractys to the Pythagoreans.

It reads "Bless us, divine number, thou who generated gods and men! O holy, holy Tetractys, thou that containest the root and source of the eternally flowing creation!"