HighFour History of Mathematics
Category B: Grades 6 – 8
Round 4
Monday, December 12, 2016
The use of calculator is not required.
Answer #1:
Explanation:
5.7 cm
A standard measure of Rubik’s cube is 5.7 cm on each side. The puzzle
consists of 26 different color of smaller cubes called cubies or cubelets.
Answer #2:
Explanation:
Prince of Mathematics
Carl Friedrich Gauss was a German mathematician who contributes
significantly to many fields such as number theory, algebra, statistics,
geometry, and many more.
Answer #3:
Explanation:
Statistics
Statistics is the study of the collection, analysis, interpretation,
presentation, and organization of data. It focuses on having surveys,
experiments or other data that is collected to organize and give a
concrete result.
Answer #4:
Explanation:
Rene Descartes
He is well-known mathematician who expressed geometric shapes in the
form of algebraic equation. It was because of him that we got
introduced to the coordinate geometry.
Answer #5:
Explanation:
Harmonic Mean
Harmonic mean is also called subcontrary mean. It is one of the
Pythagorean means and one kind of averages. It is the reciprocal of the
arithmetic mean of the reciprocals.
HighFour History of Mathematics
Category B: Grades 6 – 8
Round 4
Monday, December 12, 2016
The use of calculator is not required.
Answer #6:
Explanation:
Answer #7:
Explanation:
Marie-Sophie Germain
She was a French mathematician, physicist, and philosopher. She gained
education from books in her father’s Library including the book of
Leonhard Euler and Lagrange, Legendre, and Gauss.
The Pythagorean theorem is express as
, where a and b are
the sides or legs of the right angle, and c is the hypotenuse of the
triangle.
Answer #8:
Explanation:
1, 1, 2, 3, 5, 8
Fibonacci numbers are the terms in the Fibonacci sequence or series. It
is characterized by the fact that every number in it is the sum of the two
preceding numbers.
1 – first term
0+1=
1 – second term
1+1=
2 – third term
1+2=
3 – third term
2+3=
5 – fourth term
3+5=
8 – fifth term
Answer #9:
Explanation:
Combination(s)
“nCr” in scientific calculator means “n choose r” This is the combinations
calculator and will find the number of possible combinations that can be
obtained by taking a sub-set of items from a larger set.
Answer #10:
Explanation:
10
Decimal numeral system is also called as denary or base 10 numbers.
Even decimal notations often refers to a base 10 positional notation
such as the Hindu-Arabic numeral system.
HighFour History of Mathematics
Category B: Grades 6 – 8
Round 4
Monday, December 12, 2016
The use of calculator is not required.
Answer #11:
Explanation:
Equiangular
The word equiangular means having equal angles. Triangles that are
equilateral (have equal sides) are also equiangular (have equal angles).
Answer #12:
Explanation:
Protractor
Protractor is usually used to measure angles in degrees. Some
protractors are simple half-discs in size. But more advanced protractors
have one or two swinging arms.
Answer #13:
Explanation:
M
Roman numerals, the numeric system used in ancient Rome, employs
combinations of letters from the Latin alphabet to signify values.
1000 = M
Answer #14:
Explanation:
Geoboard
It is a mathematical tool used to explore basic polygons in plane
geometry. It is also used to measure perimeter and area of shapes.
Geoboards were invented and popularized in the 1950s by Egyptian
mathematician Caleb Gattegno.
Answer #15:
Explanation:
Icosahedron
Icosahedron is a polyhedron with 20 faces. The name comes from the
Greek words eikosi, which means “twenty”, and hedra, which means
“base.” A regular icosahedron can be convex and concave.
HighFour History of Mathematics
Category B: Grades 6 – 8
Round 4
Monday, December 12, 2016
The use of calculator is not required.
Answer #16:
Explanation:
Tangent
In Geometry, tangent is a straight line that touches a curve or a plane at
a given point. Mathematician Leibniz denied it as the line through a pair
of infinitely close points on the curve.
Answer #17:
Explanation:
25 cm
The width of the slide rule is quoted in terms of the nominal width of the
scales. Scales of the most common 10-inch models are actually 25 cm, as
they were made to metric standards.
Answer #18:
Explanation:
Bit
A binary digit is also called a bit. It is the smallest unit of data in a
computer. A bit has a single binary value, either 1 or 0. Sometimes,
numbers are not use, instead the words :on: and “off.”
Answer #19:
Explanation:
Circumference
Perimeter is the sum of all the measure of the sides of a shape. Since
circle has no edges, the whole curve covering its inside part is
considered as its side. The perimeter of the circle is called as the
circumference of a circle.
Answer #20:
Explanation:
Cubit
Cubit is an ancient measure of length. It is approximately equal to the
length of a forearm or from your elbow to the tip of your middle finger.
The term cubit is still used in hedge laying, the length of the forearm
being frequently used to determine the interval between stakes placed
within the hedge.