Average or average refers to the average of all numbers.

Mode refers to the number with the highest frequency in a number set.

Range refers to the maximum number MINUS the minimum number in a number set. That is, (minimum value, maximum value)

Algebra algebra

1.？ Number theory?

Natural number? Positive number. Positive number? Negative number negative number

Odd integers, odd numbers? Even integer, even number?

Integer, integer integer positive integer positive integer? Negative integer negative integer

Continuous integer real number, rational number real number, rational number?

Irrational number ($ NUMBER) Irrational number (reciprocal of number

Composite prime number

Common divisor. Common divisor multiple?

(minimum) common multiple (minimum) common multiple (prime factor) factor

Decimal decimal

Non-negative non-negative ten-digit unit single mode mode mode mode mode mode

Average median common ratio common ratio

2. Basic mathematical concepts

Arithmetic average Arithmetic average? Weighted average weighted average? geometric mean

Exponential index, power? Base versus power, bottom? Cube number, cube? Square root square root cube root

Cube root? Common logarithm. Common logarithm? Digital number? Constant. Constant? Variable inverse

Inverse function? Complementary function. Complementary function? Linear, linear

Factorization Factorization Absolute value? Rounding mathematics

3. Basic operation

Add, add? Reduce the burden, multiply, multiply? Product? Product?

Divide divide divide divide divide divide divide divisor.

Factor, divisor, common divisor quotient? The factorial order of the remainder is the power of the power,

Root number, root circle to circle? round up or down

4.？ Algebraic expressions, equations, inequalities

Algebra $ TERM Algebra terms like terms, similar terms?

Numeric coefficient, literal coefficient and letter coefficient? inequality

Inequality Triangle Inequality Triangle Inequality Range Original Equation

Primitive equation? Equivalent equation Same solution equation, equivalent equation? linear equation

linear equation

5.？ mark

Real score. Real score? The score is not appropriate. Fake score? Fractional mixed number? civilian

Fraction, ordinary fraction. Ordinary fraction? Simple fraction. Simple fraction? compound/complex fraction

Complex fraction molecule? Denominator Denominator? (minimum) common denominator

A quarter? Decimalfraction pure decimal? Infinite decimal. Infinite decimal? circular

Decimal cycle decimal? One tenth unit

put together

Trade union alliance? Proper subset proper subset? Solution set solution set?

7.？ Ordered sequence

Arithmetic progression (series) arithmetic progression? Geometrical

Series (series) geometric series?

8.？ Other?

Approximate approximation? (Reverse) clockwise (reverse) clockwise? Cardinal number? Ordinal number?

In direct proportion? Very different? Estimate estimate, approximate value? parentheses

Brackets? Proportion ratio? Permutation arrangement? Combination combination? Table. Table?

Trigonometric function Trigonometric function unit, bit?

Geometric geometry

1. Angle

Internal angle of alternating angle? Corresponding angle and complementary angle? Is the vertical angle opposite to the vertex angle?

Central angle Central angle? Inner angle. Inner angle? Outside corner. Outside corner?

Fill the corner, fill the corner, fill the corner? Adjacent angle?

Acute angle acute angle obtuse angle right angle? Rounded corners?

Right angle. Right angle? bevel angle

2.？ triangle

Equilateral triangle. equilateral triangle? An equilateral triangle. An equilateral triangle? Isosceles

Triangle, isosceles triangle? Right triangle. Right triangle? Oblique triangle? inscribe

Triangle inscribed triangle

3.？ Convergent plane figures, except triangles?

Semicircle? Semicircle? Concentric circles concentric circles? Quadrilateral quadrilateral? pentagon

Pentagonal hexagon? Seven sides. Seven sides? Octagonal octagon? Nonagon nonagon? A decagon. A decagon

Polygon. Polygon? Parallelogram parallelogram? Equilateral equilateral? Airplane. Airplane? square

Square, square? Rectangular. Rectangular? Regular polygon regular polygon rhombus rhombus? Trapezoidal trapezium

4.？ Other plane graphics

Arc, line segment, parallel line segment, parallel line segment

Arc 5. Stereographic figure

Cubes Cubes, the number of cubes? Rectangular solid box? Regular solid/regular polyhedron

Regular polyhedral cylinder? Cone cone sphere sphere sphere? Three - dimensional

6.？ Attached concept of graph

Plane geometry plane geometry? Trigonometry. Trigonometry? Equal share? Limit the scope

Inscribe? Intersect？ Vertical vertical? pythagorean theorem

Pythagorean theorem (Pythagorean theorem) congruent multilateral multilateral height high depth? One side, one side

Side length and perimeter? Radian radian surface area surface area? roll

Volume? Right-angled triangular thigh of arm? Cross section. Cross section? A heartstring in a circle

String? Diameter, diameter, radius and angle bisector? Diagonal diagonalization? Edge edge?

Is the face hypotenuse of the three-dimensional face insufficient? Including side legs

Right-angled side of triangle, midline? Base, base? opposite

What is the midpoint of the opposite side of a right triangle? Endpoint endpoint? Vertex (complex form vertex) vertex? tangent

The cross section of the tangent? Interception interception

7.？ coordinate

Coordinate system. Coordinate system? Rectangular coordinate origin rectangular coordinate system

Abscissa abscissa ordinate digital line digital axis? Quadrant quadrant? slanting

Slope complex plane

8.？ Unit of measurement?

Cents? Penny? Penny? Nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel nickel

Twenty (20)? Celsius? Fahrenheit Fahrenheit? Quart. Quart? Gallon Gallon (1 gallon =

4 quarts)? Code code? Mimi? Micron? Micron? Inch by inch? Full? minute

Minute (unit of measurement of angle, 60 minutes = 1 degree)? Square measurement square unit system? Cubic meters? pint

Pint (dry or liquid unit of volume)

basic law

All prime numbers (except 2) are odd numbers, but odd numbers are not necessarily prime numbers.

If b>a, then b/a > (b+1)/(a+1); Joao B.

There are seven kinds of statistical questions that are easy to get in GRE.

1. mode (mode): the number that appears most frequently in a bunch of numbers.

2.range (range) The difference between the maximum value and the minimum value in a series of numbers.

Arithmetic average

The n-th root of the product of geometric mean n numbers

4. Median value

After sorting a string of numbers, the middle number (odd number) or the average value of the middle two numbers (even number).

5. Standard error (standard deviation)

In a pile of numbers, the sum of the absolute values of the difference between each number and the average value is divided by the number (n) of the pile.

6. Standard deviation

In a pile of numbers, the sum of the squares of the difference between each number and the average value, and then divided by n.

7. The standard deviation is the square root of the standard deviation.